Import Axe Core Accessibility Testing Library

third_party/axe-core/axe.js

+/*! aXe v2.3.1
+ * Copyright (c) 2017 Deque Systems, Inc.
+ *
+ * Your use of this Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This entire copyright notice must appear in every copy of this file you
+ * distribute or in any file that contains substantial portions of this source
+ * code.
+ */
+(function axeFunction(window) {
+  var global = window;
+  var document = window.document;
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  var axe = axe || {};
+  axe.version = '2.3.1';
+  if (typeof define === 'function' && define.amd) {
+    define([], function() {
+      'use strict';
+      return axe;
+    });
+  }
+  if ((typeof module === 'undefined' ? 'undefined' : _typeof(module)) === 'object' && module.exports && typeof axeFunction.toString === 'function') {
+    axe.source = '(' + axeFunction.toString() + ')(typeof window === "object" ? window : this);';
+    module.exports = axe;
+  }
+  if (typeof window.getComputedStyle === 'function') {
+    window.axe = axe;
+  }
+  var commons;
+  function SupportError(error) {
+    this.name = 'SupportError';
+    this.cause = error.cause;
+    this.message = '`' + error.cause + '` - feature unsupported in your environment.';
+    if (error.ruleId) {
+      this.ruleId = error.ruleId;
+      this.message += ' Skipping ' + this.ruleId + ' rule.';
+    }
+    this.stack = new Error().stack;
+  }
+  SupportError.prototype = Object.create(Error.prototype);
+  SupportError.prototype.constructor = SupportError;
+  'use strict';
+  var utils = axe.utils = {};
+  'use strict';
+  var helpers = {};
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  function getDefaultConfiguration(audit) {
+    'use strict';
+    var config;
+    if (audit) {
+      config = axe.utils.clone(audit);
+      config.commons = audit.commons;
+    } else {
+      config = {};
+    }
+    config.reporter = config.reporter || null;
+    config.rules = config.rules || [];
+    config.checks = config.checks || [];
+    config.data = Object.assign({
+      checks: {},
+      rules: {}
+    }, config.data);
+    return config;
+  }
+  function unpackToObject(collection, audit, method) {
+    'use strict';
+    var i, l;
+    for (i = 0, l = collection.length; i < l; i++) {
+      audit[method](collection[i]);
+    }
+  }
+  function Audit(audit) {
+    this.brand = 'axe';
+    this.application = 'axeAPI';
+    this.tagExclude = [ 'experimental' ];
+    this.defaultConfig = audit;
+    this._init();
+  }
+  Audit.prototype._init = function() {
+    var audit = getDefaultConfiguration(this.defaultConfig);
+    axe.commons = commons = audit.commons;
+    this.reporter = audit.reporter;
+    this.commands = {};
+    this.rules = [];
+    this.checks = {};
+    unpackToObject(audit.rules, this, 'addRule');
+    unpackToObject(audit.checks, this, 'addCheck');
+    this.data = {};
+    this.data.checks = audit.data && audit.data.checks || {};
+    this.data.rules = audit.data && audit.data.rules || {};
+    this.data.failureSummaries = audit.data && audit.data.failureSummaries || {};
+    this.data.incompleteFallbackMessage = audit.data && audit.data.incompleteFallbackMessage || '';
+    this._constructHelpUrls();
+  };
+  Audit.prototype.registerCommand = function(command) {
+    'use strict';
+    this.commands[command.id] = command.callback;
+  };
+  Audit.prototype.addRule = function(spec) {
+    'use strict';
+    if (spec.metadata) {
+      this.data.rules[spec.id] = spec.metadata;
+    }
+    var rule = this.getRule(spec.id);
+    if (rule) {
+      rule.configure(spec);
+    } else {
+      this.rules.push(new Rule(spec, this));
+    }
+  };
+  Audit.prototype.addCheck = function(spec) {
+    'use strict';
+    var metadata = spec.metadata;
+    if ((typeof metadata === 'undefined' ? 'undefined' : _typeof(metadata)) === 'object') {
+      this.data.checks[spec.id] = metadata;
+      if (_typeof(metadata.messages) === 'object') {
+        Object.keys(metadata.messages).filter(function(prop) {
+          return metadata.messages.hasOwnProperty(prop) && typeof metadata.messages[prop] === 'string';
+        }).forEach(function(prop) {
+          if (metadata.messages[prop].indexOf('function') === 0) {
+            metadata.messages[prop] = new Function('return ' + metadata.messages[prop] + ';')();
+          }
+        });
+      }
+    }
+    if (this.checks[spec.id]) {
+      this.checks[spec.id].configure(spec);
+    } else {
+      this.checks[spec.id] = new Check(spec);
+    }
+  };
+  Audit.prototype.run = function(context, options, resolve, reject) {
+    'use strict';
+    this.validateOptions(options);
+    axe._tree = axe.utils.getFlattenedTree(document.body);
+    var q = axe.utils.queue();
+    this.rules.forEach(function(rule) {
+      if (axe.utils.ruleShouldRun(rule, context, options)) {
+        if (options.performanceTimer) {
+          var markEnd = 'mark_rule_end_' + rule.id;
+          var markStart = 'mark_rule_start_' + rule.id;
+          axe.utils.performanceTimer.mark(markStart);
+        }
+        q.defer(function(res, rej) {
+          rule.run(context, options, function(out) {
+            if (options.performanceTimer) {
+              axe.utils.performanceTimer.mark(markEnd);
+              axe.utils.performanceTimer.measure('rule_' + rule.id, markStart, markEnd);
+            }
+            res(out);
+          }, function(err) {
+            if (!options.debug) {
+              var errResult = Object.assign(new RuleResult(rule), {
+                result: axe.constants.CANTTELL,
+                description: 'An error occured while running this rule',
+                message: err.message,
+                help: err.stack || err.message,
+                error: err
+              });
+              res(errResult);
+            } else {
+              rej(err);
+            }
+          });
+        });
+      }
+    });
+    q.then(function(results) {
+      axe._tree = undefined;
+      resolve(results.filter(function(result) {
+        return !!result;
+      }));
+    }).catch(reject);
+  };
+  Audit.prototype.after = function(results, options) {
+    'use strict';
+    var rules = this.rules;
+    return results.map(function(ruleResult) {
+      var rule = axe.utils.findBy(rules, 'id', ruleResult.id);
+      return rule.after(ruleResult, options);
+    });
+  };
+  Audit.prototype.getRule = function(ruleId) {
+    return this.rules.find(function(rule) {
+      return rule.id === ruleId;
+    });
+  };
+  Audit.prototype.validateOptions = function(options) {
+    'use strict';
+    var audit = this;
+    if (_typeof(options.runOnly) === 'object') {
+      var only = options.runOnly;
+      if (only.type === 'rule' && Array.isArray(only.value)) {
+        only.value.forEach(function(ruleId) {
+          if (!audit.getRule(ruleId)) {
+            throw new Error('unknown rule `' + ruleId + '` in options.runOnly');
+          }
+        });
+      } else if (Array.isArray(only.value) && only.value.length > 0) {
+        var tags = [].concat(only.value);
+        audit.rules.forEach(function(rule) {
+          var tagPos, i, l;
+          if (!tags) {
+            return;
+          }
+          for (i = 0, l = rule.tags.length; i < l; i++) {
+            tagPos = tags.indexOf(rule.tags[i]);
+            if (tagPos !== -1) {
+              tags.splice(tagPos, 1);
+            }
+          }
+        });
+        if (tags.length !== 0) {
+          throw new Error('could not find tags `' + tags.join('`, `') + '`');
+        }
+      }
+    }
+    if (_typeof(options.rules) === 'object') {
+      Object.keys(options.rules).forEach(function(ruleId) {
+        if (!audit.getRule(ruleId)) {
+          throw new Error('unknown rule `' + ruleId + '` in options.rules');
+        }
+      });
+    }
+    return options;
+  };
+  Audit.prototype.setBranding = function(branding) {
+    'use strict';
+    var previous = {
+      brand: this.brand,
+      application: this.application
+    };
+    if (branding && branding.hasOwnProperty('brand') && branding.brand && typeof branding.brand === 'string') {
+      this.brand = branding.brand;
+    }
+    if (branding && branding.hasOwnProperty('application') && branding.application && typeof branding.application === 'string') {
+      this.application = branding.application;
+    }
+    this._constructHelpUrls(previous);
+  };
+  function getHelpUrl(_ref, ruleId, version) {
+    var brand = _ref.brand, application = _ref.application;
+    return axe.constants.helpUrlBase + brand + '/' + (version || axe.version.substring(0, axe.version.lastIndexOf('.'))) + '/' + ruleId + '?application=' + application;
+  }
+  Audit.prototype._constructHelpUrls = function() {
+    var _this = this;
+    var previous = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
+    var version = axe.version.substring(0, axe.version.lastIndexOf('.'));
+    this.rules.forEach(function(rule) {
+      if (!_this.data.rules[rule.id]) {
+        _this.data.rules[rule.id] = {};
+      }
+      var metaData = _this.data.rules[rule.id];
+      if (typeof metaData.helpUrl !== 'string' || previous && metaData.helpUrl === getHelpUrl(previous, rule.id, version)) {
+        metaData.helpUrl = getHelpUrl(_this, rule.id, version);
+      }
+    });
+  };
+  Audit.prototype.resetRulesAndChecks = function() {
+    'use strict';
+    this._init();
+  };
+  'use strict';
+  function CheckResult(check) {
+    'use strict';
+    this.id = check.id;
+    this.data = null;
+    this.relatedNodes = [];
+    this.result = null;
+  }
+  'use strict';
+  function createExecutionContext(spec) {
+    'use strict';
+    if (typeof spec === 'string') {
+      return new Function('return ' + spec + ';')();
+    }
+    return spec;
+  }
+  function Check(spec) {
+    if (spec) {
+      this.id = spec.id;
+      this.configure(spec);
+    }
+  }
+  Check.prototype.enabled = true;
+  Check.prototype.run = function(node, options, resolve, reject) {
+    'use strict';
+    options = options || {};
+    var enabled = options.hasOwnProperty('enabled') ? options.enabled : this.enabled, checkOptions = options.options || this.options;
+    if (enabled) {
+      var checkResult = new CheckResult(this);
+      var checkHelper = axe.utils.checkHelper(checkResult, options, resolve, reject);
+      var result;
+      try {
+        result = this.evaluate.call(checkHelper, node.actualNode, checkOptions, node);
+      } catch (e) {
+        reject(e);
+        return;
+      }
+      if (!checkHelper.isAsync) {
+        checkResult.result = result;
+        setTimeout(function() {
+          resolve(checkResult);
+        }, 0);
+      }
+    } else {
+      resolve(null);
+    }
+  };
+  Check.prototype.configure = function(spec) {
+    var _this = this;
+    [ 'options', 'enabled' ].filter(function(prop) {
+      return spec.hasOwnProperty(prop);
+    }).forEach(function(prop) {
+      return _this[prop] = spec[prop];
+    });
+    [ 'evaluate', 'after' ].filter(function(prop) {
+      return spec.hasOwnProperty(prop);
+    }).forEach(function(prop) {
+      return _this[prop] = createExecutionContext(spec[prop]);
+    });
+  };
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  function pushUniqueFrame(collection, frame) {
+    'use strict';
+    if (axe.utils.isHidden(frame)) {
+      return;
+    }
+    var fr = axe.utils.findBy(collection, 'node', frame);
+    if (!fr) {
+      collection.push({
+        node: frame,
+        include: [],
+        exclude: []
+      });
+    }
+  }
+  function pushUniqueFrameSelector(context, type, selectorArray) {
+    'use strict';
+    context.frames = context.frames || [];
+    var result, frame;
+    var frames = document.querySelectorAll(selectorArray.shift());
+    frameloop: for (var i = 0, l = frames.length; i < l; i++) {
+      frame = frames[i];
+      for (var j = 0, l2 = context.frames.length; j < l2; j++) {
+        if (context.frames[j].node === frame) {
+          context.frames[j][type].push(selectorArray);
+          break frameloop;
+        }
+      }
+      result = {
+        node: frame,
+        include: [],
+        exclude: []
+      };
+      if (selectorArray) {
+        result[type].push(selectorArray);
+      }
+      context.frames.push(result);
+    }
+  }
+  function normalizeContext(context) {
+    'use strict';
+    if (context && (typeof context === 'undefined' ? 'undefined' : _typeof(context)) === 'object' || context instanceof NodeList) {
+      if (context instanceof Node) {
+        return {
+          include: [ context ],
+          exclude: []
+        };
+      }
+      if (context.hasOwnProperty('include') || context.hasOwnProperty('exclude')) {
+        return {
+          include: context.include && +context.include.length ? context.include : [ document ],
+          exclude: context.exclude || []
+        };
+      }
+      if (context.length === +context.length) {
+        return {
+          include: context,
+          exclude: []
+        };
+      }
+    }
+    if (typeof context === 'string') {
+      return {
+        include: [ context ],
+        exclude: []
+      };
+    }
+    return {
+      include: [ document ],
+      exclude: []
+    };
+  }
+  function parseSelectorArray(context, type) {
+    'use strict';
+    var item, result = [], nodeList;
+    for (var i = 0, l = context[type].length; i < l; i++) {
+      item = context[type][i];
+      if (typeof item === 'string') {
+        nodeList = Array.from(document.querySelectorAll(item));
+        result = result.concat(nodeList.map(function(node) {
+          return axe.utils.getFlattenedTree(node)[0];
+        }));
+        break;
+      } else if (item && item.length && !(item instanceof Node)) {
+        if (item.length > 1) {
+          pushUniqueFrameSelector(context, type, item);
+        } else {
+          nodeList = Array.from(document.querySelectorAll(item[0]));
+          result = result.concat(nodeList.map(function(node) {
+            return axe.utils.getFlattenedTree(node)[0];
+          }));
+        }
+      } else if (item instanceof Node) {
+        result.push(axe.utils.getFlattenedTree(item)[0]);
+      }
+    }
+    return result.filter(function(r) {
+      return r;
+    });
+  }
+  function validateContext(context) {
+    'use strict';
+    if (context.include.length === 0) {
+      if (context.frames.length === 0) {
+        var env = axe.utils.respondable.isInFrame() ? 'frame' : 'page';
+        return new Error('No elements found for include in ' + env + ' Context');
+      }
+      context.frames.forEach(function(frame, i) {
+        if (frame.include.length === 0) {
+          return new Error('No elements found for include in Context of frame ' + i);
+        }
+      });
+    }
+  }
+  function Context(spec) {
+    'use strict';
+    var self = this;
+    this.frames = [];
+    this.initiator = spec && typeof spec.initiator === 'boolean' ? spec.initiator : true;
+    this.page = false;
+    spec = normalizeContext(spec);
+    this.exclude = spec.exclude;
+    this.include = spec.include;
+    this.include = parseSelectorArray(this, 'include');
+    this.exclude = parseSelectorArray(this, 'exclude');
+    axe.utils.select('frame, iframe', this).forEach(function(frame) {
+      if (isNodeInContext(frame, self)) {
+        pushUniqueFrame(self.frames, frame.actualNode);
+      }
+    });
+    if (this.include.length === 1 && this.include[0].actualNode === document.documentElement) {
+      this.page = true;
+    }
+    var err = validateContext(this);
+    if (err instanceof Error) {
+      throw err;
+    }
+  }
+  'use strict';
+  function RuleResult(rule) {
+    'use strict';
+    this.id = rule.id;
+    this.result = axe.constants.NA;
+    this.pageLevel = rule.pageLevel;
+    this.impact = null;
+    this.nodes = [];
+  }
+  'use strict';
+  function Rule(spec, parentAudit) {
+    'use strict';
+    this._audit = parentAudit;
+    this.id = spec.id;
+    this.selector = spec.selector || '*';
+    this.excludeHidden = typeof spec.excludeHidden === 'boolean' ? spec.excludeHidden : true;
+    this.enabled = typeof spec.enabled === 'boolean' ? spec.enabled : true;
+    this.pageLevel = typeof spec.pageLevel === 'boolean' ? spec.pageLevel : false;
+    this.any = spec.any || [];
+    this.all = spec.all || [];
+    this.none = spec.none || [];
+    this.tags = spec.tags || [];
+    if (spec.matches) {
+      this.matches = createExecutionContext(spec.matches);
+    }
+  }
+  Rule.prototype.matches = function() {
+    'use strict';
+    return true;
+  };
+  Rule.prototype.gather = function(context) {
+    'use strict';
+    var elements = axe.utils.select(this.selector, context);
+    if (this.excludeHidden) {
+      return elements.filter(function(element) {
+        return !axe.utils.isHidden(element.actualNode);
+      });
+    }
+    return elements;
+  };
+  Rule.prototype.runChecks = function(type, node, options, resolve, reject) {
+    'use strict';
+    var self = this;
+    var checkQueue = axe.utils.queue();
+    this[type].forEach(function(c) {
+      var check = self._audit.checks[c.id || c];
+      var option = axe.utils.getCheckOption(check, self.id, options);
+      checkQueue.defer(function(res, rej) {
+        check.run(node, option, res, rej);
+      });
+    });
+    checkQueue.then(function(results) {
+      results = results.filter(function(check) {
+        return check;
+      });
+      resolve({
+        type: type,
+        results: results
+      });
+    }).catch(reject);
+  };
+  Rule.prototype.run = function(context, options, resolve, reject) {
+    var _this = this;
+    var q = axe.utils.queue();
+    var ruleResult = new RuleResult(this);
+    var nodes = void 0;
+    try {
+      nodes = this.gather(context).filter(function(node) {
+        return _this.matches(node.actualNode);
+      });
+    } catch (error) {
+      reject(new SupportError({
+        cause: error,
+        ruleId: this.id
+      }));
+      return;
+    }
+    if (options.performanceTimer) {
+      axe.log('gather (', nodes.length, '):', axe.utils.performanceTimer.timeElapsed() + 'ms');
+    }
+    nodes.forEach(function(node) {
+      q.defer(function(resolveNode, rejectNode) {
+        var checkQueue = axe.utils.queue();
+        checkQueue.defer(function(res, rej) {
+          _this.runChecks('any', node, options, res, rej);
+        });
+        checkQueue.defer(function(res, rej) {
+          _this.runChecks('all', node, options, res, rej);
+        });
+        checkQueue.defer(function(res, rej) {
+          _this.runChecks('none', node, options, res, rej);
+        });
+        checkQueue.then(function(results) {
+          if (results.length) {
+            var hasResults = false, result = {};
+            results.forEach(function(r) {
+              var res = r.results.filter(function(result) {
+                return result;
+              });
+              result[r.type] = res;
+              if (res.length) {
+                hasResults = true;
+              }
+            });
+            if (hasResults) {
+              result.node = new axe.utils.DqElement(node.actualNode, options);
+              ruleResult.nodes.push(result);
+            }
+          }
+          resolveNode();
+        }).catch(function(err) {
+          return rejectNode(err);
+        });
+      });
+    });
+    q.then(function() {
+      return resolve(ruleResult);
+    }).catch(function(error) {
+      return reject(error);
+    });
+  };
+  function findAfterChecks(rule) {
+    'use strict';
+    return axe.utils.getAllChecks(rule).map(function(c) {
+      var check = rule._audit.checks[c.id || c];
+      return check && typeof check.after === 'function' ? check : null;
+    }).filter(Boolean);
+  }
+  function findCheckResults(nodes, checkID) {
+    'use strict';
+    var checkResults = [];
+    nodes.forEach(function(nodeResult) {
+      var checks = axe.utils.getAllChecks(nodeResult);
+      checks.forEach(function(checkResult) {
+        if (checkResult.id === checkID) {
+          checkResults.push(checkResult);
+        }
+      });
+    });
+    return checkResults;
+  }
+  function filterChecks(checks) {
+    'use strict';
+    return checks.filter(function(check) {
+      return check.filtered !== true;
+    });
+  }
+  function sanitizeNodes(result) {
+    'use strict';
+    var checkTypes = [ 'any', 'all', 'none' ];
+    var nodes = result.nodes.filter(function(detail) {
+      var length = 0;
+      checkTypes.forEach(function(type) {
+        detail[type] = filterChecks(detail[type]);
+        length += detail[type].length;
+      });
+      return length > 0;
+    });
+    if (result.pageLevel && nodes.length) {
+      nodes = [ nodes.reduce(function(a, b) {
+        if (a) {
+          checkTypes.forEach(function(type) {
+            a[type].push.apply(a[type], b[type]);
+          });
+          return a;
+        }
+      }) ];
+    }
+    return nodes;
+  }
+  Rule.prototype.after = function(result, options) {
+    'use strict';
+    var afterChecks = findAfterChecks(this);
+    var ruleID = this.id;
+    afterChecks.forEach(function(check) {
+      var beforeResults = findCheckResults(result.nodes, check.id);
+      var option = axe.utils.getCheckOption(check, ruleID, options);
+      var afterResults = check.after(beforeResults, option);
+      beforeResults.forEach(function(item) {
+        if (afterResults.indexOf(item) === -1) {
+          item.filtered = true;
+        }
+      });
+    });
+    result.nodes = sanitizeNodes(result);
+    return result;
+  };
+  Rule.prototype.configure = function(spec) {
+    'use strict';
+    if (spec.hasOwnProperty('selector')) {
+      this.selector = spec.selector;
+    }
+    if (spec.hasOwnProperty('excludeHidden')) {
+      this.excludeHidden = typeof spec.excludeHidden === 'boolean' ? spec.excludeHidden : true;
+    }
+    if (spec.hasOwnProperty('enabled')) {
+      this.enabled = typeof spec.enabled === 'boolean' ? spec.enabled : true;
+    }
+    if (spec.hasOwnProperty('pageLevel')) {
+      this.pageLevel = typeof spec.pageLevel === 'boolean' ? spec.pageLevel : false;
+    }
+    if (spec.hasOwnProperty('any')) {
+      this.any = spec.any;
+    }
+    if (spec.hasOwnProperty('all')) {
+      this.all = spec.all;
+    }
+    if (spec.hasOwnProperty('none')) {
+      this.none = spec.none;
+    }
+    if (spec.hasOwnProperty('tags')) {
+      this.tags = spec.tags;
+    }
+    if (spec.hasOwnProperty('matches')) {
+      if (typeof spec.matches === 'string') {
+        this.matches = new Function('return ' + spec.matches + ';')();
+      } else {
+        this.matches = spec.matches;
+      }
+    }
+  };
+  'use strict';
+  (function(axe) {
+    var definitions = [ {
+      name: 'NA',
+      value: 'inapplicable',
+      priority: 0,
+      group: 'inapplicable'
+    }, {
+      name: 'PASS',
+      value: 'passed',
+      priority: 1,
+      group: 'passes'
+    }, {
+      name: 'CANTTELL',
+      value: 'cantTell',
+      priority: 2,
+      group: 'incomplete'
+    }, {
+      name: 'FAIL',
+      value: 'failed',
+      priority: 3,
+      group: 'violations'
+    } ];
+    var constants = {
+      helpUrlBase: 'https://dequeuniversity.com/rules/',
+      results: [],
+      resultGroups: [],
+      resultGroupMap: {},
+      impact: Object.freeze([ 'minor', 'moderate', 'serious', 'critical' ])
+    };
+    definitions.forEach(function(definition) {
+      var name = definition.name;
+      var value = definition.value;
+      var priority = definition.priority;
+      var group = definition.group;
+      constants[name] = value;
+      constants[name + '_PRIO'] = priority;
+      constants[name + '_GROUP'] = group;
+      constants.results[priority] = value;
+      constants.resultGroups[priority] = group;
+      constants.resultGroupMap[value] = group;
+    });
+    Object.freeze(constants.results);
+    Object.freeze(constants.resultGroups);
+    Object.freeze(constants.resultGroupMap);
+    Object.freeze(constants);
+    Object.defineProperty(axe, 'constants', {
+      value: constants,
+      enumerable: true,
+      configurable: false,
+      writable: false
+    });
+  })(axe);
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  axe.log = function() {
+    'use strict';
+    if ((typeof console === 'undefined' ? 'undefined' : _typeof(console)) === 'object' && console.log) {
+      Function.prototype.apply.call(console.log, console, arguments);
+    }
+  };
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  axe.a11yCheck = function(context, options, callback) {
+    'use strict';
+    if (typeof options === 'function') {
+      callback = options;
+      options = {};
+    }
+    if (!options || (typeof options === 'undefined' ? 'undefined' : _typeof(options)) !== 'object') {
+      options = {};
+    }
+    var audit = axe._audit;
+    if (!audit) {
+      throw new Error('No audit configured');
+    }
+    options.reporter = options.reporter || audit.reporter || 'v2';
+    if (options.performanceTimer) {
+      axe.utils.performanceTimer.start();
+    }
+    var reporter = axe.getReporter(options.reporter);
+    axe._runRules(context, options, function(results) {
+      var res = reporter(results, options, callback);
+      if (res !== undefined) {
+        if (options.performanceTimer) {
+          axe.utils.performanceTimer.end();
+        }
+        callback(res);
+      }
+    }, axe.log);
+  };
+  'use strict';
+  function cleanupPlugins(resolve, reject) {
+    'use strict';
+    if (!axe._audit) {
+      throw new Error('No audit configured');
+    }
+    var q = axe.utils.queue();
+    var cleanupErrors = [];
+    Object.keys(axe.plugins).forEach(function(key) {
+      q.defer(function(res) {
+        var rej = function rej(err) {
+          cleanupErrors.push(err);
+          res();
+        };
+        try {
+          axe.plugins[key].cleanup(res, rej);
+        } catch (err) {
+          rej(err);
+        }
+      });
+    });
+    axe.utils.toArray(document.querySelectorAll('frame, iframe')).forEach(function(frame) {
+      q.defer(function(res, rej) {
+        return axe.utils.sendCommandToFrame(frame, {
+          command: 'cleanup-plugin'
+        }, res, rej);
+      });
+    });
+    q.then(function(results) {
+      if (cleanupErrors.length === 0) {
+        resolve(results);
+      } else {
+        reject(cleanupErrors);
+      }
+    }).catch(reject);
+  }
+  axe.cleanup = cleanupPlugins;
+  'use strict';
+  function configureChecksRulesAndBranding(spec) {
+    'use strict';
+    var audit;
+    audit = axe._audit;
+    if (!audit) {
+      throw new Error('No audit configured');
+    }
+    if (spec.reporter && (typeof spec.reporter === 'function' || reporters[spec.reporter])) {
+      audit.reporter = spec.reporter;
+    }
+    if (spec.checks) {
+      spec.checks.forEach(function(check) {
+        audit.addCheck(check);
+      });
+    }
+    if (spec.rules) {
+      spec.rules.forEach(function(rule) {
+        audit.addRule(rule);
+      });
+    }
+    if (typeof spec.branding !== 'undefined') {
+      audit.setBranding(spec.branding);
+    } else {
+      audit._constructHelpUrls();
+    }
+    if (spec.tagExclude) {
+      audit.tagExclude = spec.tagExclude;
+    }
+  }
+  axe.configure = configureChecksRulesAndBranding;
+  'use strict';
+  axe.getRules = function(tags) {
+    'use strict';
+    tags = tags || [];
+    var matchingRules = !tags.length ? axe._audit.rules : axe._audit.rules.filter(function(item) {
+      return !!tags.filter(function(tag) {
+        return item.tags.indexOf(tag) !== -1;
+      }).length;
+    });
+    var ruleData = axe._audit.data.rules || {};
+    return matchingRules.map(function(matchingRule) {
+      var rd = ruleData[matchingRule.id] || {};
+      return {
+        ruleId: matchingRule.id,
+        description: rd.description,
+        help: rd.help,
+        helpUrl: rd.helpUrl,
+        tags: matchingRule.tags
+      };
+    });
+  };
+  'use strict';
+  function runCommand(data, keepalive, callback) {
+    'use strict';
+    var resolve = callback;
+    var reject = function reject(err) {
+      if (err instanceof Error === false) {
+        err = new Error(err);
+      }
+      callback(err);
+    };
+    var context = data && data.context || {};
+    if (context.include && !context.include.length) {
+      context.include = [ document ];
+    }
+    var options = data && data.options || {};
+    switch (data.command) {
+     case 'rules':
+      return runRules(context, options, resolve, reject);
+
+     case 'cleanup-plugin':
+      return cleanupPlugins(resolve, reject);
+
+     default:
+      if (axe._audit && axe._audit.commands && axe._audit.commands[data.command]) {
+        return axe._audit.commands[data.command](data, callback);
+      }
+    }
+  }
+  axe._load = function(audit) {
+    'use strict';
+    axe.utils.respondable.subscribe('axe.ping', function(data, keepalive, respond) {
+      respond({
+        axe: true
+      });
+    });
+    axe.utils.respondable.subscribe('axe.start', runCommand);
+    axe._audit = new Audit(audit);
+  };
+  'use strict';
+  var axe = axe || {};
+  axe.plugins = {};
+  function Plugin(spec) {
+    'use strict';
+    this._run = spec.run;
+    this._collect = spec.collect;
+    this._registry = {};
+    spec.commands.forEach(function(command) {
+      axe._audit.registerCommand(command);
+    });
+  }
+  Plugin.prototype.run = function() {
+    'use strict';
+    return this._run.apply(this, arguments);
+  };
+  Plugin.prototype.collect = function() {
+    'use strict';
+    return this._collect.apply(this, arguments);
+  };
+  Plugin.prototype.cleanup = function(done) {
+    'use strict';
+    var q = axe.utils.queue();
+    var that = this;
+    Object.keys(this._registry).forEach(function(key) {
+      q.defer(function(done) {
+        that._registry[key].cleanup(done);
+      });
+    });
+    q.then(function() {
+      done();
+    });
+  };
+  Plugin.prototype.add = function(impl) {
+    'use strict';
+    this._registry[impl.id] = impl;
+  };
+  axe.registerPlugin = function(plugin) {
+    'use strict';
+    axe.plugins[plugin.id] = new Plugin(plugin);
+  };
+  'use strict';
+  var reporters = {};
+  var defaultReporter;
+  axe.getReporter = function(reporter) {
+    'use strict';
+    if (typeof reporter === 'string' && reporters[reporter]) {
+      return reporters[reporter];
+    }
+    if (typeof reporter === 'function') {
+      return reporter;
+    }
+    return defaultReporter;
+  };
+  axe.addReporter = function registerReporter(name, cb, isDefault) {
+    'use strict';
+    reporters[name] = cb;
+    if (isDefault) {
+      defaultReporter = cb;
+    }
+  };
+  'use strict';
+  function resetConfiguration() {
+    'use strict';
+    var audit = axe._audit;
+    if (!audit) {
+      throw new Error('No audit configured');
+    }
+    audit.resetRulesAndChecks();
+  }
+  axe.reset = resetConfiguration;
+  'use strict';
+  function runRules(context, options, resolve, reject) {
+    'use strict';
+    try {
+      context = new Context(context);
+    } catch (e) {
+      return reject(e);
+    }
+    var q = axe.utils.queue();
+    var audit = axe._audit;
+    if (options.performanceTimer) {
+      axe.utils.performanceTimer.auditStart();
+    }
+    if (context.frames.length && options.iframes !== false) {
+      q.defer(function(res, rej) {
+        axe.utils.collectResultsFromFrames(context, options, 'rules', null, res, rej);
+      });
+    }
+    q.defer(function(res, rej) {
+      audit.run(context, options, res, rej);
+    });
+    q.then(function(data) {
+      try {
+        if (options.performanceTimer) {
+          axe.utils.performanceTimer.auditEnd();
+        }
+        var results = axe.utils.mergeResults(data.map(function(d) {
+          return {
+            results: d
+          };
+        }));
+        if (context.initiator) {
+          results = audit.after(results, options);
+          results.forEach(axe.utils.publishMetaData);
+          results = results.map(axe.utils.finalizeRuleResult);
+        }
+        try {
+          resolve(results);
+        } catch (e) {
+          axe.log(e);
+        }
+      } catch (e) {
+        reject(e);
+      }
+    }).catch(reject);
+  }
+  axe._runRules = runRules;
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  function isContext(potential) {
+    'use strict';
+    switch (true) {
+     case typeof potential === 'string':
+     case Array.isArray(potential):
+     case Node && potential instanceof Node:
+     case NodeList && potential instanceof NodeList:
+      return true;
+
+     case (typeof potential === 'undefined' ? 'undefined' : _typeof(potential)) !== 'object':
+      return false;
+
+     case potential.include !== undefined:
+     case potential.exclude !== undefined:
+     case typeof potential.length === 'number':
+      return true;
+
+     default:
+      return false;
+    }
+  }
+  var noop = function noop() {};
+  function normalizeRunParams(context, options, callback) {
+    'use strict';
+    var typeErr = new TypeError('axe.run arguments are invalid');
+    if (!isContext(context)) {
+      if (callback !== undefined) {
+        throw typeErr;
+      }
+      callback = options;
+      options = context;
+      context = document;
+    }
+    if ((typeof options === 'undefined' ? 'undefined' : _typeof(options)) !== 'object') {
+      if (callback !== undefined) {
+        throw typeErr;
+      }
+      callback = options;
+      options = {};
+    }
+    if (typeof callback !== 'function' && callback !== undefined) {
+      throw typeErr;
+    }
+    return {
+      context: context,
+      options: options,
+      callback: callback || noop
+    };
+  }
+  axe.run = function(context, options, callback) {
+    'use strict';
+    if (!axe._audit) {
+      throw new Error('No audit configured');
+    }
+    var args = normalizeRunParams(context, options, callback);
+    context = args.context;
+    options = args.options;
+    callback = args.callback;
+    options.reporter = options.reporter || axe._audit.reporter || 'v1';
+    if (options.performanceTimer) {
+      axe.utils.performanceTimer.start();
+    }
+    var p = void 0;
+    var reject = noop;
+    var resolve = noop;
+    if (window.Promise && callback === noop) {
+      p = new Promise(function(_resolve, _reject) {
+        reject = _reject;
+        resolve = _resolve;
+      });
+    }
+    axe._runRules(context, options, function(rawResults) {
+      var respond = function respond(results) {
+        try {
+          callback(null, results);
+        } catch (e) {
+          axe.log(e);
+        }
+        resolve(results);
+      };
+      if (options.performanceTimer) {
+        axe.utils.performanceTimer.end();
+      }
+      try {
+        var reporter = axe.getReporter(options.reporter);
+        var results = reporter(rawResults, options, respond);
+        if (results !== undefined) {
+          respond(results);
+        }
+      } catch (err) {
+        callback(err);
+        reject(err);
+      }
+    }, function(err) {
+      callback(err);
+      reject(err);
+    });
+    return p;
+  };
+  'use strict';
+  helpers.failureSummary = function failureSummary(nodeData) {
+    'use strict';
+    var failingChecks = {};
+    failingChecks.none = nodeData.none.concat(nodeData.all);
+    failingChecks.any = nodeData.any;
+    return Object.keys(failingChecks).map(function(key) {
+      if (!failingChecks[key].length) {
+        return;
+      }
+      var sum = axe._audit.data.failureSummaries[key];
+      if (sum && typeof sum.failureMessage === 'function') {
+        return sum.failureMessage(failingChecks[key].map(function(check) {
+          return check.message || '';
+        }));
+      }
+    }).filter(function(i) {
+      return i !== undefined;
+    }).join('\n\n');
+  };
+  'use strict';
+  helpers.incompleteFallbackMessage = function incompleteFallbackMessage() {
+    'use strict';
+    return axe._audit.data.incompleteFallbackMessage();
+  };
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  function normalizeRelatedNodes(node, options) {
+    'use strict';
+    [ 'any', 'all', 'none' ].forEach(function(type) {
+      if (!Array.isArray(node[type])) {
+        return;
+      }
+      node[type].filter(function(checkRes) {
+        return Array.isArray(checkRes.relatedNodes);
+      }).forEach(function(checkRes) {
+        checkRes.relatedNodes = checkRes.relatedNodes.map(function(relatedNode) {
+          var res = {
+            html: relatedNode.source
+          };
+          if (options.elementRef && !relatedNode.fromFrame) {
+            res.element = relatedNode.element;
+          }
+          if (options.selectors !== false || relatedNode.fromFrame) {
+            res.target = relatedNode.selector;
+          }
+          if (options.xpath) {
+            res.xpath = relatedNode.xpath;
+          }
+          return res;
+        });
+      });
+    });
+  }
+  var resultKeys = axe.constants.resultGroups;
+  helpers.processAggregate = function(results, options) {
+    var resultObject = axe.utils.aggregateResult(results);
+    resultObject.timestamp = new Date().toISOString();
+    resultObject.url = window.location.href;
+    resultKeys.forEach(function(key) {
+      resultObject[key] = (resultObject[key] || []).map(function(ruleResult) {
+        ruleResult = Object.assign({}, ruleResult);
+        if (Array.isArray(ruleResult.nodes) && ruleResult.nodes.length > 0) {
+          ruleResult.nodes = ruleResult.nodes.map(function(subResult) {
+            if (_typeof(subResult.node) === 'object') {
+              subResult.html = subResult.node.source;
+              if (options.elementRef && !subResult.node.fromFrame) {
+                subResult.element = subResult.node.element;
+              }
+              if (options.selectors !== false || subResult.node.fromFrame) {
+                subResult.target = subResult.node.selector;
+              }
+              if (options.xpath) {
+                subResult.xpath = subResult.node.xpath;
+              }
+            }
+            delete subResult.result;
+            delete subResult.node;
+            normalizeRelatedNodes(subResult, options);
+            return subResult;
+          });
+        }
+        resultKeys.forEach(function(key) {
+          return delete ruleResult[key];
+        });
+        delete ruleResult.pageLevel;
+        delete ruleResult.result;
+        return ruleResult;
+      });
+    });
+    return resultObject;
+  };
+  'use strict';
+  axe.addReporter('na', function(results, options, callback) {
+    'use strict';
+    if (typeof options === 'function') {
+      callback = options;
+      options = {};
+    }
+    var out = helpers.processAggregate(results, options);
+    callback({
+      violations: out.violations,
+      passes: out.passes,
+      incomplete: out.incomplete,
+      inapplicable: out.inapplicable,
+      timestamp: out.timestamp,
+      url: out.url
+    });
+  });
+  'use strict';
+  axe.addReporter('no-passes', function(results, options, callback) {
+    'use strict';
+    if (typeof options === 'function') {
+      callback = options;
+      options = {};
+    }
+    var out = helpers.processAggregate(results, options);
+    callback({
+      violations: out.violations,
+      timestamp: out.timestamp,
+      url: out.url
+    });
+  });
+  'use strict';
+  axe.addReporter('raw', function(results, options, callback) {
+    'use strict';
+    if (typeof options === 'function') {
+      callback = options;
+      options = {};
+    }
+    callback(results);
+  });
+  'use strict';
+  axe.addReporter('v1', function(results, options, callback) {
+    'use strict';
+    if (typeof options === 'function') {
+      callback = options;
+      options = {};
+    }
+    var out = helpers.processAggregate(results, options);
+    out.violations.forEach(function(result) {
+      return result.nodes.forEach(function(nodeResult) {
+        nodeResult.failureSummary = helpers.failureSummary(nodeResult);
+      });
+    });
+    callback({
+      violations: out.violations,
+      passes: out.passes,
+      incomplete: out.incomplete,
+      inapplicable: out.inapplicable,
+      timestamp: out.timestamp,
+      url: out.url
+    });
+  });
+  'use strict';
+  axe.addReporter('v2', function(results, options, callback) {
+    'use strict';
+    if (typeof options === 'function') {
+      callback = options;
+      options = {};
+    }
+    var out = helpers.processAggregate(results, options);
+    callback({
+      violations: out.violations,
+      passes: out.passes,
+      incomplete: out.incomplete,
+      inapplicable: out.inapplicable,
+      timestamp: out.timestamp,
+      url: out.url
+    });
+  }, true);
+  'use strict';
+  axe.utils.aggregate = function(map, values, initial) {
+    values = values.slice();
+    if (initial) {
+      values.push(initial);
+    }
+    var sorting = values.map(function(val) {
+      return map.indexOf(val);
+    }).sort();
+    return map[sorting.pop()];
+  };
+  'use strict';
+  var checkMap = [];
+  checkMap[axe.constants.PASS_PRIO] = true;
+  checkMap[axe.constants.CANTTELL_PRIO] = null;
+  checkMap[axe.constants.FAIL_PRIO] = false;
+  var checkTypes = [ 'any', 'all', 'none' ];
+  function anyAllNone(obj, functor) {
+    return checkTypes.reduce(function(out, type) {
+      out[type] = (obj[type] || []).map(function(val) {
+        return functor(val, type);
+      });
+      return out;
+    }, {});
+  }
+  axe.utils.aggregateChecks = function(nodeResOriginal) {
+    var nodeResult = Object.assign({}, nodeResOriginal);
+    anyAllNone(nodeResult, function(check, type) {
+      var i = checkMap.indexOf(check.result);
+      check.priority = i !== -1 ? i : axe.constants.CANTTELL_PRIO;
+      if (type === 'none') {
+        check.priority = 4 - check.priority;
+      }
+    });
+    var priorities = anyAllNone(nodeResult, function(c) {
+      return c.priority;
+    });
+    nodeResult.priority = Math.max(priorities.all.reduce(function(a, b) {
+      return Math.max(a, b);
+    }, 0), priorities.none.reduce(function(a, b) {
+      return Math.max(a, b);
+    }, 0), priorities.any.reduce(function(a, b) {
+      return Math.min(a, b);
+    }, 4) % 4);
+    var impacts = [];
+    checkTypes.forEach(function(type) {
+      nodeResult[type] = nodeResult[type].filter(function(check) {
+        return check.priority === nodeResult.priority;
+      });
+      nodeResult[type].forEach(function(check) {
+        return impacts.push(check.impact);
+      });
+    });
+    if (nodeResult.priority === axe.constants.FAIL_PRIO) {
+      nodeResult.impact = axe.utils.aggregate(axe.constants.impact, impacts);
+    } else {
+      nodeResult.impact = null;
+    }
+    anyAllNone(nodeResult, function(c) {
+      delete c.result;
+      delete c.priority;
+    });
+    nodeResult.result = axe.constants.results[nodeResult.priority];
+    delete nodeResult.priority;
+    return nodeResult;
+  };
+  'use strict';
+  function copyToGroup(resultObject, subResult, group) {
+    var resultCopy = Object.assign({}, subResult);
+    resultCopy.nodes = (resultCopy[group] || []).concat();
+    axe.constants.resultGroups.forEach(function(group) {
+      delete resultCopy[group];
+    });
+    resultObject[group].push(resultCopy);
+  }
+  axe.utils.aggregateResult = function(results) {
+    var resultObject = {};
+    axe.constants.resultGroups.forEach(function(groupName) {
+      return resultObject[groupName] = [];
+    });
+    results.forEach(function(subResult) {
+      if (subResult.error) {
+        copyToGroup(resultObject, subResult, axe.constants.CANTTELL_GROUP);
+      } else if (subResult.result === axe.constants.NA) {
+        copyToGroup(resultObject, subResult, axe.constants.NA_GROUP);
+      } else {
+        axe.constants.resultGroups.forEach(function(group) {
+          if (Array.isArray(subResult[group]) && subResult[group].length > 0) {
+            copyToGroup(resultObject, subResult, group);
+          }
+        });
+      }
+    });
+    return resultObject;
+  };
+  'use strict';
+  (function() {
+    axe.utils.aggregateRule = function(subResults) {
+      var ruleResult = {};
+      subResults = subResults.map(function(subResult) {
+        if (subResult.any && subResult.all && subResult.none) {
+          return axe.utils.aggregateChecks(subResult);
+        } else if (Array.isArray(subResult.node)) {
+          return axe.utils.finalizeRuleResult(subResult);
+        } else {
+          throw new TypeError('Invalid Result type');
+        }
+      });
+      var resultList = subResults.map(function(node) {
+        return node.result;
+      });
+      ruleResult.result = axe.utils.aggregate(axe.constants.results, resultList, ruleResult.result);
+      axe.constants.resultGroups.forEach(function(group) {
+        return ruleResult[group] = [];
+      });
+      subResults.forEach(function(subResult) {
+        var groupName = axe.constants.resultGroupMap[subResult.result];
+        ruleResult[groupName].push(subResult);
+      });
+      var failGroup = axe.constants.FAIL_GROUP;
+      if (ruleResult[failGroup].length > 0) {
+        var impactList = ruleResult[failGroup].map(function(failure) {
+          return failure.impact;
+        });
+        ruleResult.impact = axe.utils.aggregate(axe.constants.impact, impactList) || null;
+      } else {
+        ruleResult.impact = null;
+      }
+      return ruleResult;
+    };
+  })();
+  'use strict';
+  function areStylesSet(el, styles, stopAt) {
+    'use strict';
+    var styl = window.getComputedStyle(el, null);
+    var set = false;
+    if (!styl) {
+      return false;
+    }
+    styles.forEach(function(att) {
+      if (styl.getPropertyValue(att.property) === att.value) {
+        set = true;
+      }
+    });
+    if (set) {
+      return true;
+    }
+    if (el.nodeName.toUpperCase() === stopAt.toUpperCase() || !el.parentNode) {
+      return false;
+    }
+    return areStylesSet(el.parentNode, styles, stopAt);
+  }
+  axe.utils.areStylesSet = areStylesSet;
+  'use strict';
+  axe.utils.checkHelper = function checkHelper(checkResult, options, resolve, reject) {
+    'use strict';
+    return {
+      isAsync: false,
+      async: function async() {
+        this.isAsync = true;
+        return function(result) {
+          if (result instanceof Error === false) {
+            checkResult.value = result;
+            resolve(checkResult);
+          } else {
+            reject(result);
+          }
+        };
+      },
+      data: function data(_data) {
+        checkResult.data = _data;
+      },
+      relatedNodes: function relatedNodes(nodes) {
+        nodes = nodes instanceof Node ? [ nodes ] : axe.utils.toArray(nodes);
+        checkResult.relatedNodes = nodes.map(function(element) {
+          return new axe.utils.DqElement(element, options);
+        });
+      }
+    };
+  };
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  axe.utils.clone = function(obj) {
+    'use strict';
+    var index, length, out = obj;
+    if (obj !== null && (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object') {
+      if (Array.isArray(obj)) {
+        out = [];
+        for (index = 0, length = obj.length; index < length; index++) {
+          out[index] = axe.utils.clone(obj[index]);
+        }
+      } else {
+        out = {};
+        for (index in obj) {
+          out[index] = axe.utils.clone(obj[index]);
+        }
+      }
+    }
+    return out;
+  };
+  'use strict';
+  function err(message, node) {
+    'use strict';
+    return new Error(message + ': ' + axe.utils.getSelector(node));
+  }
+  axe.utils.sendCommandToFrame = function(node, parameters, resolve, reject) {
+    'use strict';
+    var win = node.contentWindow;
+    if (!win) {
+      axe.log('Frame does not have a content window', node);
+      resolve(null);
+      return;
+    }
+    var timeout = setTimeout(function() {
+      timeout = setTimeout(function() {
+        var errMsg = err('No response from frame', node);
+        if (!parameters.debug) {
+          axe.log(errMsg);
+          resolve(null);
+        } else {
+          reject(errMsg);
+        }
+      }, 0);
+    }, 500);
+    axe.utils.respondable(win, 'axe.ping', null, undefined, function() {
+      clearTimeout(timeout);
+      timeout = setTimeout(function() {
+        reject(err('Axe in frame timed out', node));
+      }, 3e4);
+      axe.utils.respondable(win, 'axe.start', parameters, undefined, function(data) {
+        clearTimeout(timeout);
+        if (data instanceof Error === false) {
+          resolve(data);
+        } else {
+          reject(data);
+        }
+      });
+    });
+  };
+  function collectResultsFromFrames(context, options, command, parameter, resolve, reject) {
+    'use strict';
+    var q = axe.utils.queue();
+    var frames = context.frames;
+    frames.forEach(function(frame) {
+      var params = {
+        options: options,
+        command: command,
+        parameter: parameter,
+        context: {
+          initiator: false,
+          page: context.page,
+          include: frame.include || [],
+          exclude: frame.exclude || []
+        }
+      };
+      q.defer(function(res, rej) {
+        var node = frame.node;
+        axe.utils.sendCommandToFrame(node, params, function(data) {
+          if (data) {
+            return res({
+              results: data,
+              frameElement: node,
+              frame: axe.utils.getSelector(node)
+            });
+          }
+          res(null);
+        }, rej);
+      });
+    });
+    q.then(function(data) {
+      resolve(axe.utils.mergeResults(data, options));
+    }).catch(reject);
+  }
+  axe.utils.collectResultsFromFrames = collectResultsFromFrames;
+  'use strict';
+  axe.utils.contains = function(node, otherNode) {
+    'use strict';
+    function containsShadowChild(node, otherNode) {
+      if (node.shadowId === otherNode.shadowId) {
+        return true;
+      }
+      return !!node.children.find(function(child) {
+        return containsShadowChild(child, otherNode);
+      });
+    }
+    if (node.shadowId || otherNode.shadowId) {
+      return containsShadowChild(node, otherNode);
+    }
+    if (typeof node.actualNode.contains === 'function') {
+      return node.actualNode.contains(otherNode.actualNode);
+    }
+    return !!(node.actualNode.compareDocumentPosition(otherNode.actualNode) & 16);
+  };
+  'use strict';
+  (function(axe) {
+    /*!
+  * The copyright below covers the code within this function block only
+  *
+  * Copyright (c) 2013 Dulin Marat
+  * 
+  * Permission is hereby granted, free of charge, to any person obtaining a copy
+  * of this software and associated documentation files (the "Software"), to deal
+  * in the Software without restriction, including without limitation the rights
+  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  * copies of the Software, and to permit persons to whom the Software is
+  * furnished to do so, subject to the following conditions:
+  * 
+  * The above copyright notice and this permission notice shall be included in
+  * all copies or substantial portions of the Software.
+  * 
+  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  * THE SOFTWARE.
+  */
+    function CssSelectorParser() {
+      this.pseudos = {};
+      this.attrEqualityMods = {};
+      this.ruleNestingOperators = {};
+      this.substitutesEnabled = false;
+    }
+    CssSelectorParser.prototype.registerSelectorPseudos = function(name) {
+      for (var j = 0, len = arguments.length; j < len; j++) {
+        name = arguments[j];
+        this.pseudos[name] = 'selector';
+      }
+      return this;
+    };
+    CssSelectorParser.prototype.unregisterSelectorPseudos = function(name) {
+      for (var j = 0, len = arguments.length; j < len; j++) {
+        name = arguments[j];
+        delete this.pseudos[name];
+      }
+      return this;
+    };
+    CssSelectorParser.prototype.registerNumericPseudos = function(name) {
+      for (var j = 0, len = arguments.length; j < len; j++) {
+        name = arguments[j];
+        this.pseudos[name] = 'numeric';
+      }
+      return this;
+    };
+    CssSelectorParser.prototype.unregisterNumericPseudos = function(name) {
+      for (var j = 0, len = arguments.length; j < len; j++) {
+        name = arguments[j];
+        delete this.pseudos[name];
+      }
+      return this;
+    };
+    CssSelectorParser.prototype.registerNestingOperators = function(operator) {
+      for (var j = 0, len = arguments.length; j < len; j++) {
+        operator = arguments[j];
+        this.ruleNestingOperators[operator] = true;
+      }
+      return this;
+    };
+    CssSelectorParser.prototype.unregisterNestingOperators = function(operator) {
+      for (var j = 0, len = arguments.length; j < len; j++) {
+        operator = arguments[j];
+        delete this.ruleNestingOperators[operator];
+      }
+      return this;
+    };
+    CssSelectorParser.prototype.registerAttrEqualityMods = function(mod) {
+      for (var j = 0, len = arguments.length; j < len; j++) {
+        mod = arguments[j];
+        this.attrEqualityMods[mod] = true;
+      }
+      return this;
+    };
+    CssSelectorParser.prototype.unregisterAttrEqualityMods = function(mod) {
+      for (var j = 0, len = arguments.length; j < len; j++) {
+        mod = arguments[j];
+        delete this.attrEqualityMods[mod];
+      }
+      return this;
+    };
+    CssSelectorParser.prototype.enableSubstitutes = function() {
+      this.substitutesEnabled = true;
+      return this;
+    };
+    CssSelectorParser.prototype.disableSubstitutes = function() {
+      this.substitutesEnabled = false;
+      return this;
+    };
+    function isIdentStart(c) {
+      return c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c === '-' || c === '_';
+    }
+    function isIdent(c) {
+      return c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9' || c === '-' || c === '_';
+    }
+    function isHex(c) {
+      return c >= 'a' && c <= 'f' || c >= 'A' && c <= 'F' || c >= '0' && c <= '9';
+    }
+    function isDecimal(c) {
+      return c >= '0' && c <= '9';
+    }
+    function isAttrMatchOperator(chr) {
+      return chr === '=' || chr === '^' || chr === '$' || chr === '*' || chr === '~';
+    }
+    var identSpecialChars = {
+      '!': true,
+      '"': true,
+      '#': true,
+      $: true,
+      '%': true,
+      '&': true,
+      '\'': true,
+      '(': true,
+      ')': true,
+      '*': true,
+      '+': true,
+      ',': true,
+      '.': true,
+      '/': true,
+      ';': true,
+      '<': true,
+      '=': true,
+      '>': true,
+      '?': true,
+      '@': true,
+      '[': true,
+      '\\': true,
+      ']': true,
+      '^': true,
+      '`': true,
+      '{': true,
+      '|': true,
+      '}': true,
+      '~': true
+    };
+    var strReplacementsRev = {
+      '\n': '\\n',
+      '\r': '\\r',
+      '\t': '\\t',
+      '\f': '\\f',
+      '\v': '\\v'
+    };
+    var singleQuoteEscapeChars = {
+      n: '\n',
+      r: '\r',
+      t: '\t',
+      f: '\f',
+      '\\': '\\',
+      '\'': '\''
+    };
+    var doubleQuotesEscapeChars = {
+      n: '\n',
+      r: '\r',
+      t: '\t',
+      f: '\f',
+      '\\': '\\',
+      '"': '"'
+    };
+    function ParseContext(str, pos, pseudos, attrEqualityMods, ruleNestingOperators, substitutesEnabled) {
+      var chr, getIdent, getStr, l, skipWhitespace;
+      l = str.length;
+      chr = null;
+      getStr = function getStr(quote, escapeTable) {
+        var esc, hex, result;
+        result = '';
+        pos++;
+        chr = str.charAt(pos);
+        while (pos < l) {
+          if (chr === quote) {
+            pos++;
+            return result;
+          } else if (chr === '\\') {
+            pos++;
+            chr = str.charAt(pos);
+            if (chr === quote) {
+              result += quote;
+            } else if (esc = escapeTable[chr]) {
+              result += esc;
+            } else if (isHex(chr)) {
+              hex = chr;
+              pos++;
+              chr = str.charAt(pos);
+              while (isHex(chr)) {
+                hex += chr;
+                pos++;
+                chr = str.charAt(pos);
+              }
+              if (chr === ' ') {
+                pos++;
+                chr = str.charAt(pos);
+              }
+              result += String.fromCharCode(parseInt(hex, 16));
+              continue;
+            } else {
+              result += chr;
+            }
+          } else {
+            result += chr;
+          }
+          pos++;
+          chr = str.charAt(pos);
+        }
+        return result;
+      };
+      getIdent = function getIdent() {
+        var result = '';
+        chr = str.charAt(pos);
+        while (pos < l) {
+          if (isIdent(chr)) {
+            result += chr;
+          } else if (chr === '\\') {
+            pos++;
+            if (pos >= l) {
+              throw Error('Expected symbol but end of file reached.');
+            }
+            chr = str.charAt(pos);
+            if (identSpecialChars[chr]) {
+              result += chr;
+            } else if (isHex(chr)) {
+              var hex = chr;
+              pos++;
+              chr = str.charAt(pos);
+              while (isHex(chr)) {
+                hex += chr;
+                pos++;
+                chr = str.charAt(pos);
+              }
+              if (chr === ' ') {
+                pos++;
+                chr = str.charAt(pos);
+              }
+              result += String.fromCharCode(parseInt(hex, 16));
+              continue;
+            } else {
+              result += chr;
+            }
+          } else {
+            return result;
+          }
+          pos++;
+          chr = str.charAt(pos);
+        }
+        return result;
+      };
+      skipWhitespace = function skipWhitespace() {
+        chr = str.charAt(pos);
+        var result = false;
+        while (chr === ' ' || chr === '\t' || chr === '\n' || chr === '\r' || chr === '\f') {
+          result = true;
+          pos++;
+          chr = str.charAt(pos);
+        }
+        return result;
+      };
+      this.parse = function() {
+        var res = this.parseSelector();
+        if (pos < l) {
+          throw Error('Rule expected but "' + str.charAt(pos) + '" found.');
+        }
+        return res;
+      };
+      this.parseSelector = function() {
+        var res;
+        var selector = res = this.parseSingleSelector();
+        chr = str.charAt(pos);
+        while (chr === ',') {
+          pos++;
+          skipWhitespace();
+          if (res.type !== 'selectors') {
+            res = {
+              type: 'selectors',
+              selectors: [ selector ]
+            };
+          }
+          selector = this.parseSingleSelector();
+          if (!selector) {
+            throw Error('Rule expected after ",".');
+          }
+          res.selectors.push(selector);
+        }
+        return res;
+      };
+      this.parseSingleSelector = function() {
+        skipWhitespace();
+        var selector = {
+          type: 'ruleSet'
+        };
+        var rule = this.parseRule();
+        if (!rule) {
+          return null;
+        }
+        var currentRule = selector;
+        while (rule) {
+          rule.type = 'rule';
+          currentRule.rule = rule;
+          currentRule = rule;
+          skipWhitespace();
+          chr = str.charAt(pos);
+          if (pos >= l || chr === ',' || chr === ')') {
+            break;
+          }
+          if (ruleNestingOperators[chr]) {
+            var op = chr;
+            pos++;
+            skipWhitespace();
+            rule = this.parseRule();
+            if (!rule) {
+              throw Error('Rule expected after "' + op + '".');
+            }
+            rule.nestingOperator = op;
+          } else {
+            rule = this.parseRule();
+            if (rule) {
+              rule.nestingOperator = null;
+            }
+          }
+        }
+        return selector;
+      };
+      this.parseRule = function() {
+        var rule = null;
+        while (pos < l) {
+          chr = str.charAt(pos);
+          if (chr === '*') {
+            pos++;
+            (rule = rule || {}).tagName = '*';
+          } else if (isIdentStart(chr) || chr === '\\') {
+            (rule = rule || {}).tagName = getIdent();
+          } else if (chr === '.') {
+            pos++;
+            rule = rule || {};
+            (rule.classNames = rule.classNames || []).push(getIdent());
+          } else if (chr === '#') {
+            pos++;
+            (rule = rule || {}).id = getIdent();
+          } else if (chr === '[') {
+            pos++;
+            skipWhitespace();
+            var attr = {
+              name: getIdent()
+            };
+            skipWhitespace();
+            if (chr === ']') {
+              pos++;
+            } else {
+              var operator = '';
+              if (attrEqualityMods[chr]) {
+                operator = chr;
+                pos++;
+                chr = str.charAt(pos);
+              }
+              if (pos >= l) {
+                throw Error('Expected "=" but end of file reached.');
+              }
+              if (chr !== '=') {
+                throw Error('Expected "=" but "' + chr + '" found.');
+              }
+              attr.operator = operator + '=';
+              pos++;
+              skipWhitespace();
+              var attrValue = '';
+              attr.valueType = 'string';
+              if (chr === '"') {
+                attrValue = getStr('"', doubleQuotesEscapeChars);
+              } else if (chr === '\'') {
+                attrValue = getStr('\'', singleQuoteEscapeChars);
+              } else if (substitutesEnabled && chr === '$') {
+                pos++;
+                attrValue = getIdent();
+                attr.valueType = 'substitute';
+              } else {
+                while (pos < l) {
+                  if (chr === ']') {
+                    break;
+                  }
+                  attrValue += chr;
+                  pos++;
+                  chr = str.charAt(pos);
+                }
+                attrValue = attrValue.trim();
+              }
+              skipWhitespace();
+              if (pos >= l) {
+                throw Error('Expected "]" but end of file reached.');
+              }
+              if (chr !== ']') {
+                throw Error('Expected "]" but "' + chr + '" found.');
+              }
+              pos++;
+              attr.value = attrValue;
+            }
+            rule = rule || {};
+            (rule.attrs = rule.attrs || []).push(attr);
+          } else if (chr === ':') {
+            pos++;
+            var pseudoName = getIdent();
+            var pseudo = {
+              name: pseudoName
+            };
+            if (chr === '(') {
+              pos++;
+              var value = '';
+              skipWhitespace();
+              if (pseudos[pseudoName] === 'selector') {
+                pseudo.valueType = 'selector';
+                value = this.parseSelector();
+              } else {
+                pseudo.valueType = pseudos[pseudoName] || 'string';
+                if (chr === '"') {
+                  value = getStr('"', doubleQuotesEscapeChars);
+                } else if (chr === '\'') {
+                  value = getStr('\'', singleQuoteEscapeChars);
+                } else if (substitutesEnabled && chr === '$') {
+                  pos++;
+                  value = getIdent();
+                  pseudo.valueType = 'substitute';
+                } else {
+                  while (pos < l) {
+                    if (chr === ')') {
+                      break;
+                    }
+                    value += chr;
+                    pos++;
+                    chr = str.charAt(pos);
+                  }
+                  value = value.trim();
+                }
+                skipWhitespace();
+              }
+              if (pos >= l) {
+                throw Error('Expected ")" but end of file reached.');
+              }
+              if (chr !== ')') {
+                throw Error('Expected ")" but "' + chr + '" found.');
+              }
+              pos++;
+              pseudo.value = value;
+            }
+            rule = rule || {};
+            (rule.pseudos = rule.pseudos || []).push(pseudo);
+          } else {
+            break;
+          }
+        }
+        return rule;
+      };
+      return this;
+    }
+    CssSelectorParser.prototype.parse = function(str) {
+      var context = new ParseContext(str, 0, this.pseudos, this.attrEqualityMods, this.ruleNestingOperators, this.substitutesEnabled);
+      return context.parse();
+    };
+    CssSelectorParser.prototype.escapeIdentifier = function(s) {
+      var result = '';
+      var i = 0;
+      var len = s.length;
+      while (i < len) {
+        var chr = s.charAt(i);
+        if (identSpecialChars[chr]) {
+          result += '\\' + chr;
+        } else {
+          if (!(chr === '_' || chr === '-' || chr >= 'A' && chr <= 'Z' || chr >= 'a' && chr <= 'z' || i !== 0 && chr >= '0' && chr <= '9')) {
+            var charCode = chr.charCodeAt(0);
+            if ((charCode & 63488) === 55296) {
+              var extraCharCode = s.charCodeAt(i++);
+              if ((charCode & 64512) !== 55296 || (extraCharCode & 64512) !== 56320) {
+                throw Error('UCS-2(decode): illegal sequence');
+              }
+              charCode = ((charCode & 1023) << 10) + (extraCharCode & 1023) + 65536;
+            }
+            result += '\\' + charCode.toString(16) + ' ';
+          } else {
+            result += chr;
+          }
+        }
+        i++;
+      }
+      return result;
+    };
+    CssSelectorParser.prototype.escapeStr = function(s) {
+      var result = '';
+      var i = 0;
+      var len = s.length;
+      var chr, replacement;
+      while (i < len) {
+        chr = s.charAt(i);
+        if (chr === '"') {
+          chr = '\\"';
+        } else if (chr === '\\') {
+          chr = '\\\\';
+        } else if (replacement = strReplacementsRev[chr]) {
+          chr = replacement;
+        }
+        result += chr;
+        i++;
+      }
+      return '"' + result + '"';
+    };
+    CssSelectorParser.prototype.render = function(path) {
+      return this._renderEntity(path).trim();
+    };
+    CssSelectorParser.prototype._renderEntity = function(entity) {
+      var currentEntity, parts, res;
+      res = '';
+      switch (entity.type) {
+       case 'ruleSet':
+        currentEntity = entity.rule;
+        parts = [];
+        while (currentEntity) {
+          if (currentEntity.nestingOperator) {
+            parts.push(currentEntity.nestingOperator);
+          }
+          parts.push(this._renderEntity(currentEntity));
+          currentEntity = currentEntity.rule;
+        }
+        res = parts.join(' ');
+        break;
+
+       case 'selectors':
+        res = entity.selectors.map(this._renderEntity, this).join(', ');
+        break;
+
+       case 'rule':
+        if (entity.tagName) {
+          if (entity.tagName === '*') {
+            res = '*';
+          } else {
+            res = this.escapeIdentifier(entity.tagName);
+          }
+        }
+        if (entity.id) {
+          res += '#' + this.escapeIdentifier(entity.id);
+        }
+        if (entity.classNames) {
+          res += entity.classNames.map(function(cn) {
+            return '.' + this.escapeIdentifier(cn);
+          }, this).join('');
+        }
+        if (entity.attrs) {
+          res += entity.attrs.map(function(attr) {
+            if (attr.operator) {
+              if (attr.valueType === 'substitute') {
+                return '[' + this.escapeIdentifier(attr.name) + attr.operator + '$' + attr.value + ']';
+              } else {
+                return '[' + this.escapeIdentifier(attr.name) + attr.operator + this.escapeStr(attr.value) + ']';
+              }
+            } else {
+              return '[' + this.escapeIdentifier(attr.name) + ']';
+            }
+          }, this).join('');
+        }
+        if (entity.pseudos) {
+          res += entity.pseudos.map(function(pseudo) {
+            if (pseudo.valueType) {
+              if (pseudo.valueType === 'selector') {
+                return ':' + this.escapeIdentifier(pseudo.name) + '(' + this._renderEntity(pseudo.value) + ')';
+              } else if (pseudo.valueType === 'substitute') {
+                return ':' + this.escapeIdentifier(pseudo.name) + '($' + pseudo.value + ')';
+              } else if (pseudo.valueType === 'numeric') {
+                return ':' + this.escapeIdentifier(pseudo.name) + '(' + pseudo.value + ')';
+              } else {
+                return ':' + this.escapeIdentifier(pseudo.name) + '(' + this.escapeIdentifier(pseudo.value) + ')';
+              }
+            } else {
+              return ':' + this.escapeIdentifier(pseudo.name);
+            }
+          }, this).join('');
+        }
+        break;
+
+       default:
+        throw Error('Unknown entity type: "' + entity.type(+'".'));
+      }
+      return res;
+    };
+    var parser = new CssSelectorParser();
+    parser.registerNestingOperators('>');
+    axe.utils.cssParser = parser;
+  })(axe);
+  'use strict';
+  function truncate(str, maxLength) {
+    maxLength = maxLength || 300;
+    if (str.length > maxLength) {
+      var index = str.indexOf('>');
+      str = str.substring(0, index + 1);
+    }
+    return str;
+  }
+  function getSource(element) {
+    var source = element.outerHTML;
+    if (!source && typeof XMLSerializer === 'function') {
+      source = new XMLSerializer().serializeToString(element);
+    }
+    return truncate(source || '');
+  }
+  function DqElement(element, options, spec) {
+    this._fromFrame = !!spec;
+    this.spec = spec || {};
+    if (options && options.absolutePaths) {
+      this._options = {
+        toRoot: true
+      };
+    }
+    this.source = this.spec.source !== undefined ? this.spec.source : getSource(element);
+    this._element = element;
+  }
+  DqElement.prototype = {
+    get selector() {
+      return this.spec.selector || [ axe.utils.getSelector(this.element, this._options) ];
+    },
+    get xpath() {
+      return this.spec.xpath || [ axe.utils.getXpath(this.element) ];
+    },
+    get element() {
+      return this._element;
+    },
+    get fromFrame() {
+      return this._fromFrame;
+    },
+    toJSON: function toJSON() {
+      'use strict';
+      return {
+        selector: this.selector,
+        source: this.source,
+        xpath: this.xpath
+      };
+    }
+  };
+  DqElement.fromFrame = function(node, options, frame) {
+    node.selector.unshift(frame.selector);
+    node.xpath.unshift(frame.xpath);
+    return new axe.utils.DqElement(frame.element, options, node);
+  };
+  axe.utils.DqElement = DqElement;
+  'use strict';
+  axe.utils.matchesSelector = function() {
+    'use strict';
+    var method;
+    function getMethod(win) {
+      var index, candidate, elProto = win.Element.prototype, candidates = [ 'matches', 'matchesSelector', 'mozMatchesSelector', 'webkitMatchesSelector', 'msMatchesSelector' ], length = candidates.length;
+      for (index = 0; index < length; index++) {
+        candidate = candidates[index];
+        if (elProto[candidate]) {
+          return candidate;
+        }
+      }
+    }
+    return function(node, selector) {
+      if (!method || !node[method]) {
+        method = getMethod(node.ownerDocument.defaultView);
+      }
+      return node[method](selector);
+    };
+  }();
+  'use strict';
+  axe.utils.escapeSelector = function(value) {
+    'use strict';
+    var string = String(value);
+    var length = string.length;
+    var index = -1;
+    var codeUnit;
+    var result = '';
+    var firstCodeUnit = string.charCodeAt(0);
+    while (++index < length) {
+      codeUnit = string.charCodeAt(index);
+      if (codeUnit == 0) {
+        throw new Error('INVALID_CHARACTER_ERR');
+      }
+      if (codeUnit >= 1 && codeUnit <= 31 || codeUnit >= 127 && codeUnit <= 159 || index == 0 && codeUnit >= 48 && codeUnit <= 57 || index == 1 && codeUnit >= 48 && codeUnit <= 57 && firstCodeUnit == 45) {
+        result += '\\' + codeUnit.toString(16) + ' ';
+        continue;
+      }
+      if (index == 1 && codeUnit == 45 && firstCodeUnit == 45) {
+        result += '\\' + string.charAt(index);
+        continue;
+      }
+      if (codeUnit >= 128 || codeUnit == 45 || codeUnit == 95 || codeUnit >= 48 && codeUnit <= 57 || codeUnit >= 65 && codeUnit <= 90 || codeUnit >= 97 && codeUnit <= 122) {
+        result += string.charAt(index);
+        continue;
+      }
+      result += '\\' + string.charAt(index);
+    }
+    return result;
+  };
+  'use strict';
+  axe.utils.extendMetaData = function(to, from) {
+    Object.assign(to, from);
+    Object.keys(from).filter(function(prop) {
+      return typeof from[prop] === 'function';
+    }).forEach(function(prop) {
+      to[prop] = null;
+      try {
+        to[prop] = from[prop](to);
+      } catch (e) {}
+    });
+  };
+  'use strict';
+  axe.utils.finalizeRuleResult = function(ruleResult) {
+    Object.assign(ruleResult, axe.utils.aggregateRule(ruleResult.nodes));
+    delete ruleResult.nodes;
+    return ruleResult;
+  };
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  axe.utils.findBy = function(array, key, value) {
+    if (Array.isArray(array)) {
+      return array.find(function(obj) {
+        return (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object' && obj[key] === value;
+      });
+    }
+  };
+  'use strict';
+  var axe = axe || {
+    utils: {}
+  };
+  function virtualDOMfromNode(node, shadowId) {
+    return {
+      shadowId: shadowId,
+      children: [],
+      actualNode: node
+    };
+  }
+  function getSlotChildren(node) {
+    var retVal = [];
+    node = node.firstChild;
+    while (node) {
+      retVal.push(node);
+      node = node.nextSibling;
+    }
+    return retVal;
+  }
+  axe.utils.getFlattenedTree = function(node, shadowId) {
+    var retVal, realArray, nodeName;
+    function reduceShadowDOM(res, child) {
+      var replacements = axe.utils.getFlattenedTree(child, shadowId);
+      if (replacements) {
+        res = res.concat(replacements);
+      }
+      return res;
+    }
+    if (node.documentElement) {
+      node = node.documentElement;
+    }
+    nodeName = node.nodeName.toLowerCase();
+    if (node.shadowRoot && nodeName !== 'marquee') {
+      shadowId = 'a' + Math.random().toString().substring(2);
+      realArray = Array.from(node.shadowRoot.childNodes);
+      return realArray.reduce(reduceShadowDOM, []);
+    } else {
+      if (nodeName === 'content') {
+        realArray = Array.from(node.getDistributedNodes());
+        return realArray.reduce(reduceShadowDOM, []);
+      } else if (nodeName === 'slot') {
+        realArray = Array.from(node.assignedNodes());
+        if (!realArray.length) {
+          realArray = getSlotChildren(node);
+        }
+        var styl = window.getComputedStyle(node);
+        if (false && styl.display !== 'contents') {
+          retVal = virtualDOMfromNode(node, shadowId);
+          retVal.children = realArray.reduce(reduceShadowDOM, []);
+          return [ retVal ];
+        } else {
+          return realArray.reduce(reduceShadowDOM, []);
+        }
+      } else {
+        if (node.nodeType === 1) {
+          retVal = virtualDOMfromNode(node, shadowId);
+          realArray = Array.from(node.childNodes);
+          retVal.children = realArray.reduce(reduceShadowDOM, []);
+          return [ retVal ];
+        } else if (node.nodeType === 3) {
+          return [ virtualDOMfromNode(node) ];
+        }
+        return undefined;
+      }
+    }
+  };
+  axe.utils.getNodeFromTree = function(vNode, node) {
+    var found;
+    vNode.children.forEach(function(candidate) {
+      var retVal;
+      if (candidate.actualNode === node) {
+        found = candidate;
+      } else {
+        retVal = axe.utils.getNodeFromTree(candidate, node);
+        if (retVal) {
+          found = retVal;
+        }
+      }
+    });
+    return found;
+  };
+  'use strict';
+  axe.utils.getAllChecks = function getAllChecks(object) {
+    'use strict';
+    var result = [];
+    return result.concat(object.any || []).concat(object.all || []).concat(object.none || []);
+  };
+  'use strict';
+  axe.utils.getCheckOption = function(check, ruleID, options) {
+    var ruleCheckOption = ((options.rules && options.rules[ruleID] || {}).checks || {})[check.id];
+    var checkOption = (options.checks || {})[check.id];
+    var enabled = check.enabled;
+    var opts = check.options;
+    if (checkOption) {
+      if (checkOption.hasOwnProperty('enabled')) {
+        enabled = checkOption.enabled;
+      }
+      if (checkOption.hasOwnProperty('options')) {
+        opts = checkOption.options;
+      }
+    }
+    if (ruleCheckOption) {
+      if (ruleCheckOption.hasOwnProperty('enabled')) {
+        enabled = ruleCheckOption.enabled;
+      }
+      if (ruleCheckOption.hasOwnProperty('options')) {
+        opts = ruleCheckOption.options;
+      }
+    }
+    return {
+      enabled: enabled,
+      options: opts,
+      absolutePaths: options.absolutePaths
+    };
+  };
+  'use strict';
+  var _slicedToArray = function() {
+    function sliceIterator(arr, i) {
+      var _arr = [];
+      var _n = true;
+      var _d = false;
+      var _e = undefined;
+      try {
+        for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
+          _arr.push(_s.value);
+          if (i && _arr.length === i) {
+            break;
+          }
+        }
+      } catch (err) {
+        _d = true;
+        _e = err;
+      } finally {
+        try {
+          if (!_n && _i['return']) {
+            _i['return']();
+          }
+        } finally {
+          if (_d) {
+            throw _e;
+          }
+        }
+      }
+      return _arr;
+    }
+    return function(arr, i) {
+      if (Array.isArray(arr)) {
+        return arr;
+      } else if (Symbol.iterator in Object(arr)) {
+        return sliceIterator(arr, i);
+      } else {
+        throw new TypeError('Invalid attempt to destructure non-iterable instance');
+      }
+    };
+  }();
+  function isMostlyNumbers() {
+    var str = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';
+    return str.length !== 0 && (str.match(/[0-9]/g) || '').length >= str.length / 2;
+  }
+  function splitString(str, splitIndex) {
+    return [ str.substring(0, splitIndex), str.substring(splitIndex) ];
+  }
+  function uriParser(url) {
+    var original = url;
+    var protocol = '', domain = '', port = '', path = '', query = '', hash = '';
+    if (url.includes('#')) {
+      var _splitString = splitString(url, url.indexOf('#'));
+      var _splitString2 = _slicedToArray(_splitString, 2);
+      url = _splitString2[0];
+      hash = _splitString2[1];
+    }
+    if (url.includes('?')) {
+      var _splitString3 = splitString(url, url.indexOf('?'));
+      var _splitString4 = _slicedToArray(_splitString3, 2);
+      url = _splitString4[0];
+      query = _splitString4[1];
+    }
+    if (url.includes('://')) {
+      var _url$split = url.split('://');
+      var _url$split2 = _slicedToArray(_url$split, 2);
+      protocol = _url$split2[0];
+      url = _url$split2[1];
+      var _splitString5 = splitString(url, url.indexOf('/'));
+      var _splitString6 = _slicedToArray(_splitString5, 2);
+      domain = _splitString6[0];
+      url = _splitString6[1];
+    } else if (url.substr(0, 2) === '//') {
+      url = url.substr(2);
+      var _splitString7 = splitString(url, url.indexOf('/'));
+      var _splitString8 = _slicedToArray(_splitString7, 2);
+      domain = _splitString8[0];
+      url = _splitString8[1];
+    }
+    if (domain.substr(0, 4) === 'www.') {
+      domain = domain.substr(4);
+    }
+    if (domain && domain.includes(':')) {
+      var _splitString9 = splitString(domain, domain.indexOf(':'));
+      var _splitString10 = _slicedToArray(_splitString9, 2);
+      domain = _splitString10[0];
+      port = _splitString10[1];
+    }
+    path = url;
+    return {
+      original: original,
+      protocol: protocol,
+      domain: domain,
+      port: port,
+      path: path,
+      query: query,
+      hash: hash
+    };
+  }
+  axe.utils.getFriendlyUriEnd = function getFriendlyUriEnd() {
+    var uri = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : '';
+    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+    if (uri.length <= 1 || uri.substr(0, 5) === 'data:' || uri.substr(0, 11) === 'javascript:' || uri.includes('?')) {
+      return;
+    }
+    var currentDomain = options.currentDomain, _options$maxLength = options.maxLength, maxLength = _options$maxLength === undefined ? 25 : _options$maxLength;
+    var _uriParser = uriParser(uri), path = _uriParser.path, domain = _uriParser.domain, hash = _uriParser.hash;
+    var pathEnd = path.substr(path.substr(0, path.length - 2).lastIndexOf('/') + 1);
+    if (hash) {
+      if (pathEnd && (pathEnd + hash).length <= maxLength) {
+        return pathEnd + hash;
+      } else if (pathEnd.length < 2 && hash.length > 2 && hash.length <= maxLength) {
+        return hash;
+      } else {
+        return;
+      }
+    } else if (domain && domain.length < maxLength && path.length <= 1) {
+      return domain + path;
+    }
+    if (path === '/' + pathEnd && domain && currentDomain && domain !== currentDomain && (domain + path).length <= maxLength) {
+      return domain + path;
+    }
+    var lastDotIndex = pathEnd.lastIndexOf('.');
+    if ((lastDotIndex === -1 || lastDotIndex > 1) && (lastDotIndex !== -1 || pathEnd.length > 2) && pathEnd.length <= maxLength && !pathEnd.match(/index(\.[a-zA-Z]{2-4})?/) && !isMostlyNumbers(pathEnd)) {
+      return pathEnd;
+    }
+  };
+  'use strict';
+  function _toConsumableArray(arr) {
+    if (Array.isArray(arr)) {
+      for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) {
+        arr2[i] = arr[i];
+      }
+      return arr2;
+    } else {
+      return Array.from(arr);
+    }
+  }
+  var escapeSelector = axe.utils.escapeSelector;
+  function isUncommonClassName(className) {
+    return ![ 'focus', 'hover', 'hidden', 'visible', 'dirty', 'touched', 'valid', 'disable', 'enable', 'active', 'col-' ].find(function(str) {
+      return className.includes(str);
+    });
+  }
+  function getDistinctClassList(elm) {
+    if (!elm.classList || elm.classList.length === 0) {
+      return [];
+    }
+    var siblings = elm.parentNode && Array.from(elm.parentNode.children || '') || [];
+    return siblings.reduce(function(classList, childElm) {
+      if (elm === childElm) {
+        return classList;
+      } else {
+        return classList.filter(function(classItem) {
+          return !childElm.classList.contains(classItem);
+        });
+      }
+    }, Array.from(elm.classList).filter(isUncommonClassName));
+  }
+  var commonNodes = [ 'div', 'span', 'p', 'b', 'i', 'u', 'strong', 'em', 'h2', 'h3' ];
+  function getNthChildString(elm, selector) {
+    var siblings = elm.parentNode && Array.from(elm.parentNode.children || '') || [];
+    var hasMatchingSiblings = siblings.find(function(sibling) {
+      return sibling !== elm && axe.utils.matchesSelector(sibling, selector);
+    });
+    if (hasMatchingSiblings) {
+      var nthChild = 1 + siblings.indexOf(elm);
+      return ':nth-child(' + nthChild + ')';
+    } else {
+      return '';
+    }
+  }
+  var createSelector = {
+    getElmId: function getElmId(elm) {
+      if (!elm.id) {
+        return;
+      }
+      var doc = elm.getRootNode && elm.getRootNode() || document;
+      var id = '#' + escapeSelector(elm.id || '');
+      if (!id.match(/player_uid_/) && doc.querySelectorAll(id).length === 1) {
+        return id;
+      }
+    },
+    getCustomElm: function getCustomElm(elm, _ref) {
+      var isCustomElm = _ref.isCustomElm, nodeName = _ref.nodeName;
+      if (isCustomElm) {
+        return nodeName;
+      }
+    },
+    getElmRoleProp: function getElmRoleProp(elm) {
+      if (elm.hasAttribute('role')) {
+        return '[role="' + escapeSelector(elm.getAttribute('role')) + '"]';
+      }
+    },
+    getUncommonElm: function getUncommonElm(elm, _ref2) {
+      var isCommonElm = _ref2.isCommonElm, isCustomElm = _ref2.isCustomElm, nodeName = _ref2.nodeName;
+      if (!isCommonElm && !isCustomElm) {
+        nodeName = escapeSelector(nodeName);
+        if (nodeName === 'input' && elm.hasAttribute('type')) {
+          nodeName += '[type="' + elm.type + '"]';
+        }
+        return nodeName;
+      }
+    },
+    getElmNameProp: function getElmNameProp(elm) {
+      if (!elm.id && elm.name) {
+        return '[name="' + escapeSelector(elm.name) + '"]';
+      }
+    },
+    getDistinctClass: function getDistinctClass(elm, _ref3) {
+      var distinctClassList = _ref3.distinctClassList;
+      if (distinctClassList.length > 0 && distinctClassList.length < 3) {
+        return '.' + distinctClassList.map(escapeSelector).join('.');
+      }
+    },
+    getFileRefProp: function getFileRefProp(elm) {
+      var attr = void 0;
+      if (elm.hasAttribute('href')) {
+        attr = 'href';
+      } else if (elm.hasAttribute('src')) {
+        attr = 'src';
+      } else {
+        return;
+      }
+      var friendlyUriEnd = axe.utils.getFriendlyUriEnd(elm.getAttribute(attr));
+      if (friendlyUriEnd) {
+        return '[' + attr + '$="' + encodeURI(friendlyUriEnd) + '"]';
+      }
+    },
+    getCommonName: function getCommonName(elm, _ref4) {
+      var nodeName = _ref4.nodeName, isCommonElm = _ref4.isCommonElm;
+      if (isCommonElm) {
+        return nodeName;
+      }
+    }
+  };
+  function getElmFeatures(elm, featureCount) {
+    var nodeName = elm.nodeName.toLowerCase();
+    var classList = Array.from(elm.classList) || [];
+    var props = {
+      nodeName: nodeName,
+      classList: classList,
+      isCustomElm: nodeName.includes('-'),
+      isCommonElm: commonNodes.includes(nodeName),
+      distinctClassList: getDistinctClassList(elm)
+    };
+    return [ createSelector.getCustomElm, createSelector.getElmRoleProp, createSelector.getUncommonElm, createSelector.getElmNameProp, createSelector.getDistinctClass, createSelector.getFileRefProp, createSelector.getCommonName ].reduce(function(features, func) {
+      if (features.length === featureCount) {
+        return features;
+      }
+      var feature = func(elm, props);
+      if (feature) {
+        if (!feature[0].match(/[a-z]/)) {
+          features.push(feature);
+        } else {
+          features.unshift(feature);
+        }
+      }
+      return features;
+    }, []);
+  }
+  function generateSelector(elm, options, doc) {
+    var selector = void 0, addParent = void 0;
+    var _options$isUnique = options.isUnique, isUnique = _options$isUnique === undefined ? false : _options$isUnique;
+    var idSelector = createSelector.getElmId(elm);
+    var _options$featureCount = options.featureCount, featureCount = _options$featureCount === undefined ? 2 : _options$featureCount, _options$minDepth = options.minDepth, minDepth = _options$minDepth === undefined ? 1 : _options$minDepth, _options$toRoot = options.toRoot, toRoot = _options$toRoot === undefined ? false : _options$toRoot, _options$childSelecto = options.childSelectors, childSelectors = _options$childSelecto === undefined ? [] : _options$childSelecto;
+    if (idSelector) {
+      selector = idSelector;
+      isUnique = true;
+    } else {
+      selector = getElmFeatures(elm, featureCount).join('');
+      selector += getNthChildString(elm, selector);
+      isUnique = options.isUnique || doc.querySelectorAll(selector).length === 1;
+      if (!isUnique && elm === document.documentElement) {
+        selector += ':root';
+      }
+      addParent = minDepth !== 0 || !isUnique;
+    }
+    var selectorParts = [ selector ].concat(_toConsumableArray(childSelectors));
+    if (elm.parentElement && elm.parentElement.nodeType !== 11 && (toRoot || addParent)) {
+      return generateSelector(elm.parentNode, {
+        toRoot: toRoot,
+        isUnique: isUnique,
+        childSelectors: selectorParts,
+        featureCount: 1,
+        minDepth: minDepth - 1
+      }, doc);
+    } else {
+      return selectorParts.join(' > ');
+    }
+  }
+  axe.utils.getSelector = function createUniqueSelector(elm) {
+    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+    if (!elm) {
+      return '';
+    }
+    var doc = elm.getRootNode && elm.getRootNode() || document;
+    if (doc.nodeType === 11) {
+      var stack = [];
+      while (doc.nodeType === 11) {
+        stack.push({
+          elm: elm,
+          doc: doc
+        });
+        elm = doc.host;
+        doc = elm.getRootNode();
+      }
+      stack.push({
+        elm: elm,
+        doc: doc
+      });
+      return stack.reverse().map(function(comp) {
+        return generateSelector(comp.elm, options, comp.doc);
+      });
+    } else {
+      return generateSelector(elm, options, doc);
+    }
+  };
+  'use strict';
+  function getXPathArray(node, path) {
+    var sibling, count;
+    if (!node) {
+      return [];
+    }
+    if (!path && node.nodeType === 9) {
+      path = [ {
+        str: 'html'
+      } ];
+      return path;
+    }
+    path = path || [];
+    if (node.parentNode && node.parentNode !== node) {
+      path = getXPathArray(node.parentNode, path);
+    }
+    if (node.previousSibling) {
+      count = 1;
+      sibling = node.previousSibling;
+      do {
+        if (sibling.nodeType === 1 && sibling.nodeName === node.nodeName) {
+          count++;
+        }
+        sibling = sibling.previousSibling;
+      } while (sibling);
+      if (count === 1) {
+        count = null;
+      }
+    } else if (node.nextSibling) {
+      sibling = node.nextSibling;
+      do {
+        if (sibling.nodeType === 1 && sibling.nodeName === node.nodeName) {
+          count = 1;
+          sibling = null;
+        } else {
+          count = null;
+          sibling = sibling.previousSibling;
+        }
+      } while (sibling);
+    }
+    if (node.nodeType === 1) {
+      var element = {};
+      element.str = node.nodeName.toLowerCase();
+      if (node.getAttribute && node.getAttribute('id') && node.ownerDocument.querySelectorAll('#' + axe.utils.escapeSelector(node.id)).length === 1) {
+        element.id = node.getAttribute('id');
+      }
+      if (count > 1) {
+        element.count = count;
+      }
+      path.push(element);
+    }
+    return path;
+  }
+  function xpathToString(xpathArray) {
+    return xpathArray.reduce(function(str, elm) {
+      if (elm.id) {
+        return '/' + elm.str + '[@id=\'' + elm.id + '\']';
+      } else {
+        return str + ('/' + elm.str) + (elm.count > 0 ? '[' + elm.count + ']' : '');
+      }
+    }, '');
+  }
+  axe.utils.getXpath = function getXpath(node) {
+    var xpathArray = getXPathArray(node);
+    return xpathToString(xpathArray);
+  };
+  'use strict';
+  var styleSheet;
+  function injectStyle(style) {
+    'use strict';
+    if (styleSheet && styleSheet.parentNode) {
+      if (styleSheet.styleSheet === undefined) {
+        styleSheet.appendChild(document.createTextNode(style));
+      } else {
+        styleSheet.styleSheet.cssText += style;
+      }
+      return styleSheet;
+    }
+    if (!style) {
+      return;
+    }
+    var head = document.head || document.getElementsByTagName('head')[0];
+    styleSheet = document.createElement('style');
+    styleSheet.type = 'text/css';
+    if (styleSheet.styleSheet === undefined) {
+      styleSheet.appendChild(document.createTextNode(style));
+    } else {
+      styleSheet.styleSheet.cssText = style;
+    }
+    head.appendChild(styleSheet);
+    return styleSheet;
+  }
+  axe.utils.injectStyle = injectStyle;
+  'use strict';
+  axe.utils.isHidden = function isHidden(el, recursed) {
+    'use strict';
+    var parent;
+    if (el.nodeType === 9) {
+      return false;
+    }
+    if (el.nodeType === 11) {
+      el = el.host;
+    }
+    var style = window.getComputedStyle(el, null);
+    if (!style || !el.parentNode || style.getPropertyValue('display') === 'none' || !recursed && style.getPropertyValue('visibility') === 'hidden' || el.getAttribute('aria-hidden') === 'true') {
+      return true;
+    }
+    parent = el.assignedSlot ? el.assignedSlot : el.parentNode;
+    return axe.utils.isHidden(parent, true);
+  };
+  'use strict';
+  function pushFrame(resultSet, options, frameElement, frameSelector) {
+    'use strict';
+    var frameXpath = axe.utils.getXpath(frameElement);
+    var frameSpec = {
+      element: frameElement,
+      selector: frameSelector,
+      xpath: frameXpath
+    };
+    resultSet.forEach(function(res) {
+      res.node = axe.utils.DqElement.fromFrame(res.node, options, frameSpec);
+      var checks = axe.utils.getAllChecks(res);
+      if (checks.length) {
+        checks.forEach(function(check) {
+          check.relatedNodes = check.relatedNodes.map(function(node) {
+            return axe.utils.DqElement.fromFrame(node, options, frameSpec);
+          });
+        });
+      }
+    });
+  }
+  function spliceNodes(target, to) {
+    'use strict';
+    var firstFromFrame = to[0].node, sorterResult, t;
+    for (var i = 0, l = target.length; i < l; i++) {
+      t = target[i].node;
+      sorterResult = axe.utils.nodeSorter({
+        actualNode: t.element
+      }, {
+        actualNode: firstFromFrame.element
+      });
+      if (sorterResult > 0 || sorterResult === 0 && firstFromFrame.selector.length < t.selector.length) {
+        target.splice.apply(target, [ i, 0 ].concat(to));
+        return;
+      }
+    }
+    target.push.apply(target, to);
+  }
+  function normalizeResult(result) {
+    'use strict';
+    if (!result || !result.results) {
+      return null;
+    }
+    if (!Array.isArray(result.results)) {
+      return [ result.results ];
+    }
+    if (!result.results.length) {
+      return null;
+    }
+    return result.results;
+  }
+  axe.utils.mergeResults = function mergeResults(frameResults, options) {
+    'use strict';
+    var result = [];
+    frameResults.forEach(function(frameResult) {
+      var results = normalizeResult(frameResult);
+      if (!results || !results.length) {
+        return;
+      }
+      results.forEach(function(ruleResult) {
+        if (ruleResult.nodes && frameResult.frame) {
+          pushFrame(ruleResult.nodes, options, frameResult.frameElement, frameResult.frame);
+        }
+        var res = axe.utils.findBy(result, 'id', ruleResult.id);
+        if (!res) {
+          result.push(ruleResult);
+        } else {
+          if (ruleResult.nodes.length) {
+            spliceNodes(res.nodes, ruleResult.nodes);
+          }
+        }
+      });
+    });
+    return result;
+  };
+  'use strict';
+  axe.utils.nodeSorter = function nodeSorter(a, b) {
+    'use strict';
+    if (a.actualNode === b.actualNode) {
+      return 0;
+    }
+    if (a.actualNode.compareDocumentPosition(b.actualNode) & 4) {
+      return -1;
+    }
+    return 1;
+  };
+  'use strict';
+  utils.performanceTimer = function() {
+    'use strict';
+    function now() {
+      if (window.performance && window.performance) {
+        return window.performance.now();
+      }
+    }
+    var originalTime = null;
+    var lastRecordedTime = now();
+    return {
+      start: function start() {
+        this.mark('mark_axe_start');
+      },
+      end: function end() {
+        this.mark('mark_axe_end');
+        this.measure('axe', 'mark_axe_start', 'mark_axe_end');
+        this.logMeasures('axe');
+      },
+      auditStart: function auditStart() {
+        this.mark('mark_audit_start');
+      },
+      auditEnd: function auditEnd() {
+        this.mark('mark_audit_end');
+        this.measure('audit_start_to_end', 'mark_audit_start', 'mark_audit_end');
+        this.logMeasures();
+      },
+      mark: function mark(markName) {
+        if (window.performance && window.performance.mark !== undefined) {
+          window.performance.mark(markName);
+        }
+      },
+      measure: function measure(measureName, startMark, endMark) {
+        if (window.performance && window.performance.measure !== undefined) {
+          window.performance.measure(measureName, startMark, endMark);
+        }
+      },
+      logMeasures: function logMeasures(measureName) {
+        function log(req) {
+          axe.log('Measure ' + req.name + ' took ' + req.duration + 'ms');
+        }
+        if (window.performance && window.performance.getEntriesByType !== undefined) {
+          var measures = window.performance.getEntriesByType('measure');
+          for (var i = 0; i < measures.length; ++i) {
+            var req = measures[i];
+            if (req.name === measureName) {
+              log(req);
+              return;
+            }
+            log(req);
+          }
+        }
+      },
+      timeElapsed: function timeElapsed() {
+        return now() - lastRecordedTime;
+      },
+      reset: function reset() {
+        if (!originalTime) {
+          originalTime = now();
+        }
+        lastRecordedTime = now();
+      }
+    };
+  }();
+  'use strict';
+  if (typeof Object.assign !== 'function') {
+    (function() {
+      Object.assign = function(target) {
+        'use strict';
+        if (target === undefined || target === null) {
+          throw new TypeError('Cannot convert undefined or null to object');
+        }
+        var output = Object(target);
+        for (var index = 1; index < arguments.length; index++) {
+          var source = arguments[index];
+          if (source !== undefined && source !== null) {
+            for (var nextKey in source) {
+              if (source.hasOwnProperty(nextKey)) {
+                output[nextKey] = source[nextKey];
+              }
+            }
+          }
+        }
+        return output;
+      };
+    })();
+  }
+  if (!Array.prototype.find) {
+    Array.prototype.find = function(predicate) {
+      if (this === null) {
+        throw new TypeError('Array.prototype.find called on null or undefined');
+      }
+      if (typeof predicate !== 'function') {
+        throw new TypeError('predicate must be a function');
+      }
+      var list = Object(this);
+      var length = list.length >>> 0;
+      var thisArg = arguments[1];
+      var value;
+      for (var i = 0; i < length; i++) {
+        value = list[i];
+        if (predicate.call(thisArg, value, i, list)) {
+          return value;
+        }
+      }
+      return undefined;
+    };
+  }
+  axe.utils.pollyfillElementsFromPoint = function() {
+    if (document.elementsFromPoint) {
+      return document.elementsFromPoint;
+    }
+    if (document.msElementsFromPoint) {
+      return document.msElementsFromPoint;
+    }
+    var usePointer = function() {
+      var element = document.createElement('x');
+      element.style.cssText = 'pointer-events:auto';
+      return element.style.pointerEvents === 'auto';
+    }();
+    var cssProp = usePointer ? 'pointer-events' : 'visibility';
+    var cssDisableVal = usePointer ? 'none' : 'hidden';
+    var style = document.createElement('style');
+    style.innerHTML = usePointer ? '* { pointer-events: all }' : '* { visibility: visible }';
+    return function(x, y) {
+      var current, i, d;
+      var elements = [];
+      var previousPointerEvents = [];
+      document.head.appendChild(style);
+      while ((current = document.elementFromPoint(x, y)) && elements.indexOf(current) === -1) {
+        elements.push(current);
+        previousPointerEvents.push({
+          value: current.style.getPropertyValue(cssProp),
+          priority: current.style.getPropertyPriority(cssProp)
+        });
+        current.style.setProperty(cssProp, cssDisableVal, 'important');
+      }
+      for (i = previousPointerEvents.length; !!(d = previousPointerEvents[--i]); ) {
+        elements[i].style.setProperty(cssProp, d.value ? d.value : '', d.priority);
+      }
+      document.head.removeChild(style);
+      return elements;
+    };
+  };
+  if (typeof window.addEventListener === 'function') {
+    document.elementsFromPoint = axe.utils.pollyfillElementsFromPoint();
+  }
+  if (!Array.prototype.includes) {
+    Array.prototype.includes = function(searchElement) {
+      'use strict';
+      var O = Object(this);
+      var len = parseInt(O.length, 10) || 0;
+      if (len === 0) {
+        return false;
+      }
+      var n = parseInt(arguments[1], 10) || 0;
+      var k;
+      if (n >= 0) {
+        k = n;
+      } else {
+        k = len + n;
+        if (k < 0) {
+          k = 0;
+        }
+      }
+      var currentElement;
+      while (k < len) {
+        currentElement = O[k];
+        if (searchElement === currentElement || searchElement !== searchElement && currentElement !== currentElement) {
+          return true;
+        }
+        k++;
+      }
+      return false;
+    };
+  }
+  if (!Array.prototype.some) {
+    Array.prototype.some = function(fun) {
+      'use strict';
+      if (this == null) {
+        throw new TypeError('Array.prototype.some called on null or undefined');
+      }
+      if (typeof fun !== 'function') {
+        throw new TypeError();
+      }
+      var t = Object(this);
+      var len = t.length >>> 0;
+      var thisArg = arguments.length >= 2 ? arguments[1] : void 0;
+      for (var i = 0; i < len; i++) {
+        if (i in t && fun.call(thisArg, t[i], i, t)) {
+          return true;
+        }
+      }
+      return false;
+    };
+  }
+  if (!Array.from) {
+    Array.from = function() {
+      var toStr = Object.prototype.toString;
+      var isCallable = function isCallable(fn) {
+        return typeof fn === 'function' || toStr.call(fn) === '[object Function]';
+      };
+      var toInteger = function toInteger(value) {
+        var number = Number(value);
+        if (isNaN(number)) {
+          return 0;
+        }
+        if (number === 0 || !isFinite(number)) {
+          return number;
+        }
+        return (number > 0 ? 1 : -1) * Math.floor(Math.abs(number));
+      };
+      var maxSafeInteger = Math.pow(2, 53) - 1;
+      var toLength = function toLength(value) {
+        var len = toInteger(value);
+        return Math.min(Math.max(len, 0), maxSafeInteger);
+      };
+      return function from(arrayLike) {
+        var C = this;
+        var items = Object(arrayLike);
+        if (arrayLike == null) {
+          throw new TypeError('Array.from requires an array-like object - not null or undefined');
+        }
+        var mapFn = arguments.length > 1 ? arguments[1] : void undefined;
+        var T;
+        if (typeof mapFn !== 'undefined') {
+          if (!isCallable(mapFn)) {
+            throw new TypeError('Array.from: when provided, the second argument must be a function');
+          }
+          if (arguments.length > 2) {
+            T = arguments[2];
+          }
+        }
+        var len = toLength(items.length);
+        var A = isCallable(C) ? Object(new C(len)) : new Array(len);
+        var k = 0;
+        var kValue;
+        while (k < len) {
+          kValue = items[k];
+          if (mapFn) {
+            A[k] = typeof T === 'undefined' ? mapFn(kValue, k) : mapFn.call(T, kValue, k);
+          } else {
+            A[k] = kValue;
+          }
+          k += 1;
+        }
+        A.length = len;
+        return A;
+      };
+    }();
+  }
+  if (!String.prototype.includes) {
+    String.prototype.includes = function(search, start) {
+      if (typeof start !== 'number') {
+        start = 0;
+      }
+      if (start + search.length > this.length) {
+        return false;
+      } else {
+        return this.indexOf(search, start) !== -1;
+      }
+    };
+  }
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  function getIncompleteReason(checkData, messages) {
+    function getDefaultMsg(messages) {
+      if (messages.incomplete && messages.incomplete.default) {
+        return messages.incomplete.default;
+      } else {
+        return helpers.incompleteFallbackMessage();
+      }
+    }
+    if (checkData && checkData.missingData) {
+      try {
+        var msg = messages.incomplete[checkData.missingData[0].reason];
+        if (!msg) {
+          throw new Error();
+        }
+        return msg;
+      } catch (e) {
+        if (typeof checkData.missingData === 'string') {
+          return messages.incomplete[checkData.missingData];
+        } else {
+          return getDefaultMsg(messages);
+        }
+      }
+    } else {
+      return getDefaultMsg(messages);
+    }
+  }
+  function extender(checksData, shouldBeTrue) {
+    'use strict';
+    return function(check) {
+      var sourceData = checksData[check.id] || {};
+      var messages = sourceData.messages || {};
+      var data = Object.assign({}, sourceData);
+      delete data.messages;
+      if (check.result === undefined) {
+        if (_typeof(messages.incomplete) === 'object') {
+          data.message = function() {
+            return getIncompleteReason(check.data, messages);
+          };
+        } else {
+          data.message = messages.incomplete;
+        }
+      } else {
+        data.message = check.result === shouldBeTrue ? messages.pass : messages.fail;
+      }
+      axe.utils.extendMetaData(check, data);
+    };
+  }
+  axe.utils.publishMetaData = function(ruleResult) {
+    'use strict';
+    var checksData = axe._audit.data.checks || {};
+    var rulesData = axe._audit.data.rules || {};
+    var rule = axe.utils.findBy(axe._audit.rules, 'id', ruleResult.id) || {};
+    ruleResult.tags = axe.utils.clone(rule.tags || []);
+    var shouldBeTrue = extender(checksData, true);
+    var shouldBeFalse = extender(checksData, false);
+    ruleResult.nodes.forEach(function(detail) {
+      detail.any.forEach(shouldBeTrue);
+      detail.all.forEach(shouldBeTrue);
+      detail.none.forEach(shouldBeFalse);
+    });
+    axe.utils.extendMetaData(ruleResult, axe.utils.clone(rulesData[ruleResult.id] || {}));
+  };
+  'use strict';
+  var convertExpressions = function convertExpressions() {};
+  var matchExpressions = function matchExpressions() {};
+  function matchesTag(node, exp) {
+    return node.nodeType === 1 && (exp.tag === '*' || node.nodeName.toLowerCase() === exp.tag);
+  }
+  function matchesClasses(node, exp) {
+    return !exp.classes || exp.classes.reduce(function(result, cl) {
+      return result && node.className && node.className.match(cl.regexp);
+    }, true);
+  }
+  function matchesAttributes(node, exp) {
+    return !exp.attributes || exp.attributes.reduce(function(result, att) {
+      var nodeAtt = node.getAttribute(att.key);
+      return result && nodeAtt !== null && (!att.value || att.test(nodeAtt));
+    }, true);
+  }
+  function matchesId(node, exp) {
+    return !exp.id || node.id === exp.id;
+  }
+  function matchesPseudos(target, exp) {
+    if (!exp.pseudos || exp.pseudos.reduce(function(result, pseudo) {
+      if (pseudo.name === 'not') {
+        return result && !matchExpressions([ target ], pseudo.expressions, false).length;
+      }
+      throw new Error('the pseudo selector ' + pseudo.name + ' has not yet been implemented');
+    }, true)) {
+      return true;
+    }
+    return false;
+  }
+  function matchSelector(targets, exp, recurse) {
+    var result = [];
+    targets = Array.isArray(targets) ? targets : [ targets ];
+    targets.forEach(function(target) {
+      if (matchesTag(target.actualNode, exp) && matchesClasses(target.actualNode, exp) && matchesAttributes(target.actualNode, exp) && matchesId(target.actualNode, exp) && matchesPseudos(target, exp)) {
+        result.push(target);
+      }
+      if (recurse) {
+        result = result.concat(matchSelector(target.children.filter(function(child) {
+          return !exp.id || child.shadowId === target.shadowId;
+        }), exp, recurse));
+      }
+    });
+    return result;
+  }
+  var escapeRegExp = function() {
+    /*! Credit: XRegExp 0.6.1 (c) 2007-2008 Steven Levithan <http://stevenlevithan.com/regex/xregexp/> MIT License */
+    var from = /(?=[\-\[\]{}()*+?.\\\^$|,#\s])/g;
+    var to = '\\';
+    return function(string) {
+      return string.replace(from, to);
+    };
+  }();
+  var reUnescape = /\\/g;
+  function convertAttributes(atts) {
+    /*! Credit Mootools Copyright Mootools, MIT License */
+    if (!atts) {
+      return;
+    }
+    return atts.map(function(att) {
+      var attributeKey = att.name.replace(reUnescape, '');
+      var attributeValue = (att.value || '').replace(reUnescape, '');
+      var test, regexp;
+      switch (att.operator) {
+       case '^=':
+        regexp = new RegExp('^' + escapeRegExp(attributeValue));
+        break;
+
+       case '$=':
+        regexp = new RegExp(escapeRegExp(attributeValue) + '$');
+        break;
+
+       case '~=':
+        regexp = new RegExp('(^|\\s)' + escapeRegExp(attributeValue) + '(\\s|$)');
+        break;
+
+       case '|=':
+        regexp = new RegExp('^' + escapeRegExp(attributeValue) + '(-|$)');
+        break;
+
+       case '=':
+        test = function test(value) {
+          return attributeValue === value;
+        };
+        break;
+
+       case '*=':
+        test = function test(value) {
+          return value && value.indexOf(attributeValue) > -1;
+        };
+        break;
+
+       case '!=':
+        test = function test(value) {
+          return attributeValue !== value;
+        };
+        break;
+
+       default:
+        test = function test(value) {
+          return !!value;
+        };
+      }
+      if (attributeValue === '' && /^[*$^]=$/.test(att.operator)) {
+        test = function test() {
+          return false;
+        };
+      }
+      if (!test) {
+        test = function test(value) {
+          return value && regexp.test(value);
+        };
+      }
+      return {
+        key: attributeKey,
+        value: attributeValue,
+        test: test
+      };
+    });
+  }
+  function convertClasses(classes) {
+    if (!classes) {
+      return;
+    }
+    return classes.map(function(className) {
+      className = className.replace(reUnescape, '');
+      return {
+        value: className,
+        regexp: new RegExp('(^|\\s)' + escapeRegExp(className) + '(\\s|$)')
+      };
+    });
+  }
+  function convertPseudos(pseudos) {
+    if (!pseudos) {
+      return;
+    }
+    return pseudos.map(function(p) {
+      var expressions;
+      if (p.name === 'not') {
+        expressions = axe.utils.cssParser.parse(p.value);
+        expressions = expressions.selectors ? expressions.selectors : [ expressions ];
+        expressions = convertExpressions(expressions);
+      }
+      return {
+        name: p.name,
+        expressions: expressions,
+        value: p.value
+      };
+    });
+  }
+  convertExpressions = function convertExpressions(expressions) {
+    return expressions.map(function(exp) {
+      var newExp = [];
+      var rule = exp.rule;
+      while (rule) {
+        newExp.push({
+          tag: rule.tagName ? rule.tagName.toLowerCase() : '*',
+          combinator: rule.nestingOperator ? rule.nestingOperator : ' ',
+          id: rule.id,
+          attributes: convertAttributes(rule.attrs),
+          classes: convertClasses(rule.classNames),
+          pseudos: convertPseudos(rule.pseudos)
+        });
+        rule = rule.rule;
+      }
+      return newExp;
+    });
+  };
+  matchExpressions = function matchExpressions(domTree, expressions, recurse) {
+    return expressions.reduce(function(collected, exprArr) {
+      var candidates = domTree;
+      exprArr.forEach(function(exp, index) {
+        recurse = exp.combinator === '>' ? false : recurse;
+        if ([ ' ', '>' ].indexOf(exp.combinator) === -1) {
+          throw new Error('axe.utils.querySelectorAll does not support the combinator: ' + exp.combinator);
+        }
+        candidates = candidates.reduce(function(result, node) {
+          return result.concat(matchSelector(index ? node.children : node, exp, recurse));
+        }, []);
+      });
+      return collected.concat(candidates);
+    }, []);
+  };
+  axe.utils.querySelectorAll = function(domTree, selector) {
+    domTree = Array.isArray(domTree) ? domTree : [ domTree ];
+    var expressions = axe.utils.cssParser.parse(selector);
+    expressions = expressions.selectors ? expressions.selectors : [ expressions ];
+    expressions = convertExpressions(expressions);
+    return matchExpressions(domTree, expressions, true);
+  };
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  (function() {
+    'use strict';
+    function noop() {}
+    function funcGuard(f) {
+      if (typeof f !== 'function') {
+        throw new TypeError('Queue methods require functions as arguments');
+      }
+    }
+    function queue() {
+      var tasks = [];
+      var started = 0;
+      var remaining = 0;
+      var completeQueue = noop;
+      var complete = false;
+      var err;
+      var defaultFail = function defaultFail(e) {
+        err = e;
+        setTimeout(function() {
+          if (err !== undefined && err !== null) {
+            axe.log('Uncaught error (of queue)', err);
+          }
+        }, 1);
+      };
+      var failed = defaultFail;
+      function createResolve(i) {
+        return function(r) {
+          tasks[i] = r;
+          remaining -= 1;
+          if (!remaining && completeQueue !== noop) {
+            complete = true;
+            completeQueue(tasks);
+          }
+        };
+      }
+      function abort(msg) {
+        completeQueue = noop;
+        failed(msg);
+        return tasks;
+      }
+      function pop() {
+        var length = tasks.length;
+        for (;started < length; started++) {
+          var task = tasks[started];
+          try {
+            task.call(null, createResolve(started), abort);
+          } catch (e) {
+            abort(e);
+          }
+        }
+      }
+      var q = {
+        defer: function defer(fn) {
+          if ((typeof fn === 'undefined' ? 'undefined' : _typeof(fn)) === 'object' && fn.then && fn.catch) {
+            var defer = fn;
+            fn = function fn(resolve, reject) {
+              defer.then(resolve).catch(reject);
+            };
+          }
+          funcGuard(fn);
+          if (err !== undefined) {
+            return;
+          } else if (complete) {
+            throw new Error('Queue already completed');
+          }
+          tasks.push(fn);
+          ++remaining;
+          pop();
+          return q;
+        },
+        then: function then(fn) {
+          funcGuard(fn);
+          if (completeQueue !== noop) {
+            throw new Error('queue `then` already set');
+          }
+          if (!err) {
+            completeQueue = fn;
+            if (!remaining) {
+              complete = true;
+              completeQueue(tasks);
+            }
+          }
+          return q;
+        },
+        catch: function _catch(fn) {
+          funcGuard(fn);
+          if (failed !== defaultFail) {
+            throw new Error('queue `catch` already set');
+          }
+          if (!err) {
+            failed = fn;
+          } else {
+            fn(err);
+            err = null;
+          }
+          return q;
+        },
+        abort: abort
+      };
+      return q;
+    }
+    axe.utils.queue = queue;
+  })();
+  'use strict';
+  var _typeof = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol' ? function(obj) {
+    return typeof obj;
+  } : function(obj) {
+    return obj && typeof Symbol === 'function' && obj.constructor === Symbol && obj !== Symbol.prototype ? 'symbol' : typeof obj;
+  };
+  (function(exports) {
+    'use strict';
+    var messages = {}, subscribers = {};
+    function _getSource() {
+      var application = 'axe', version = '', src;
+      if (typeof axe !== 'undefined' && axe._audit && !axe._audit.application) {
+        application = axe._audit.application;
+      }
+      if (typeof axe !== 'undefined') {
+        version = axe.version;
+      }
+      src = application + '.' + version;
+      return src;
+    }
+    function verify(postedMessage) {
+      if ((typeof postedMessage === 'undefined' ? 'undefined' : _typeof(postedMessage)) === 'object' && typeof postedMessage.uuid === 'string' && postedMessage._respondable === true) {
+        var messageSource = _getSource();
+        return postedMessage._source === messageSource || postedMessage._source === 'axe.x.y.z' || messageSource === 'axe.x.y.z';
+      }
+      return false;
+    }
+    function post(win, topic, message, uuid, keepalive, callback) {
+      var error;
+      if (message instanceof Error) {
+        error = {
+          name: message.name,
+          message: message.message,
+          stack: message.stack
+        };
+        message = undefined;
+      }
+      var data = {
+        uuid: uuid,
+        topic: topic,
+        message: message,
+        error: error,
+        _respondable: true,
+        _source: _getSource(),
+        _keepalive: keepalive
+      };
+      if (typeof callback === 'function') {
+        messages[uuid] = callback;
+      }
+      win.postMessage(JSON.stringify(data), '*');
+    }
+    function respondable(win, topic, message, keepalive, callback) {
+      var id = uuid.v1();
+      post(win, topic, message, id, keepalive, callback);
+    }
+    respondable.subscribe = function(topic, callback) {
+      subscribers[topic] = callback;
+    };
+    respondable.isInFrame = function(win) {
+      win = win || window;
+      return !!win.frameElement;
+    };
+    function createResponder(source, topic, uuid) {
+      return function(message, keepalive, callback) {
+        post(source, topic, message, uuid, keepalive, callback);
+      };
+    }
+    function publish(target, data, keepalive) {
+      var topic = data.topic;
+      var subscriber = subscribers[topic];
+      if (subscriber) {
+        var responder = createResponder(target, null, data.uuid);
+        subscriber(data.message, keepalive, responder);
+      }
+    }
+    function buildErrorObject(error) {
+      var msg = error.message || 'Unknown error occurred';
+      var ErrConstructor = window[error.name] || Error;
+      if (error.stack) {
+        msg += '\n' + error.stack.replace(error.message, '');
+      }
+      return new ErrConstructor(msg);
+    }
+    function parseMessage(dataString) {
+      var data;
+      if (typeof dataString !== 'string') {
+        return;
+      }
+      try {
+        data = JSON.parse(dataString);
+      } catch (ex) {}
+      if (!verify(data)) {
+        return;
+      }
+      if (_typeof(data.error) === 'object') {
+        data.error = buildErrorObject(data.error);
+      } else {
+        data.error = undefined;
+      }
+      return data;
+    }
+    if (typeof window.addEventListener === 'function') {
+      window.addEventListener('message', function(e) {
+        var data = parseMessage(e.data);
+        if (!data) {
+          return;
+        }
+        var uuid = data.uuid;
+        var keepalive = data._keepalive;
+        var callback = messages[uuid];
+        if (callback) {
+          var result = data.error || data.message;
+          var responder = createResponder(e.source, data.topic, uuid);
+          callback(result, keepalive, responder);
+          if (!keepalive) {
+            delete messages[uuid];
+          }
+        }
+        if (!data.error) {
+          try {
+            publish(e.source, data, keepalive);
+          } catch (err) {
+            post(e.source, data.topic, err, uuid, false);
+          }
+        }
+      }, false);
+    }
+    exports.respondable = respondable;
+  })(utils);
+  'use strict';
+  function matchTags(rule, runOnly) {
+    'use strict';
+    var include, exclude, matching;
+    var defaultExclude = axe._audit && axe._audit.tagExclude ? axe._audit.tagExclude : [];
+    if (runOnly.include || runOnly.exclude) {
+      include = runOnly.include || [];
+      include = Array.isArray(include) ? include : [ include ];
+      exclude = runOnly.exclude || [];
+      exclude = Array.isArray(exclude) ? exclude : [ exclude ];
+      exclude = exclude.concat(defaultExclude.filter(function(tag) {
+        return include.indexOf(tag) === -1;
+      }));
+    } else {
+      include = Array.isArray(runOnly) ? runOnly : [ runOnly ];
+      exclude = defaultExclude.filter(function(tag) {
+        return include.indexOf(tag) === -1;
+      });
+    }
+    matching = include.some(function(tag) {
+      return rule.tags.indexOf(tag) !== -1;
+    });
+    if (matching || include.length === 0 && rule.enabled !== false) {
+      return exclude.every(function(tag) {
+        return rule.tags.indexOf(tag) === -1;
+      });
+    } else {
+      return false;
+    }
+  }
+  axe.utils.ruleShouldRun = function(rule, context, options) {
+    'use strict';
+    var runOnly = options.runOnly || {};
+    var ruleOptions = (options.rules || {})[rule.id];
+    if (rule.pageLevel && !context.page) {
+      return false;
+    } else if (runOnly.type === 'rule') {
+      return runOnly.values.indexOf(rule.id) !== -1;
+    } else if (ruleOptions && typeof ruleOptions.enabled === 'boolean') {
+      return ruleOptions.enabled;
+    } else if (runOnly.type === 'tag' && runOnly.values) {
+      return matchTags(rule, runOnly.values);
+    } else {
+      return matchTags(rule, []);
+    }
+  };
+  'use strict';
+  function getDeepest(collection) {
+    'use strict';
+    return collection.sort(function(a, b) {
+      if (axe.utils.contains(a, b)) {
+        return 1;
+      }
+      return -1;
+    })[0];
+  }
+  function isNodeInContext(node, context) {
+    'use strict';
+    var include = context.include && getDeepest(context.include.filter(function(candidate) {
+      return axe.utils.contains(candidate, node);
+    }));
+    var exclude = context.exclude && getDeepest(context.exclude.filter(function(candidate) {
+      return axe.utils.contains(candidate, node);
+    }));
+    if (!exclude && include || exclude && axe.utils.contains(exclude, include)) {
+      return true;
+    }
+    return false;
+  }
+  function pushNode(result, nodes, context) {
+    'use strict';
+    for (var i = 0, l = nodes.length; i < l; i++) {
+      if (!result.find(function(item) {
+        return item.actualNode === nodes[i].actualNode;
+      }) && isNodeInContext(nodes[i], context)) {
+        result.push(nodes[i]);
+      }
+    }
+  }
+  axe.utils.select = function select(selector, context) {
+    'use strict';
+    var result = [], candidate;
+    for (var i = 0, l = context.include.length; i < l; i++) {
+      candidate = context.include[i];
+      if (candidate.actualNode.nodeType === candidate.actualNode.ELEMENT_NODE && axe.utils.matchesSelector(candidate.actualNode, selector)) {
+        pushNode(result, [ candidate ], context);
+      }
+      pushNode(result, axe.utils.querySelectorAll(candidate, selector), context);
+    }
+    return result.sort(axe.utils.nodeSorter);
+  };
+  'use strict';
+  axe.utils.toArray = function(thing) {
+    'use strict';
+    return Array.prototype.slice.call(thing);
+  };
+  'use strict';
+  var uuid;
+  (function(_global) {
+    var _rng;
+    var _crypto = _global.crypto || _global.msCrypto;
+    if (!_rng && _crypto && _crypto.getRandomValues) {
+      var _rnds8 = new Uint8Array(16);
+      _rng = function whatwgRNG() {
+        _crypto.getRandomValues(_rnds8);
+        return _rnds8;
+      };
+    }
+    if (!_rng) {
+      var _rnds = new Array(16);
+      _rng = function _rng() {
+        for (var i = 0, r; i < 16; i++) {
+          if ((i & 3) === 0) {
+            r = Math.random() * 4294967296;
+          }
+          _rnds[i] = r >>> ((i & 3) << 3) & 255;
+        }
+        return _rnds;
+      };
+    }
+    var BufferClass = typeof _global.Buffer == 'function' ? _global.Buffer : Array;
+    var _byteToHex = [];
+    var _hexToByte = {};
+    for (var i = 0; i < 256; i++) {
+      _byteToHex[i] = (i + 256).toString(16).substr(1);
+      _hexToByte[_byteToHex[i]] = i;
+    }
+    function parse(s, buf, offset) {
+      var i = buf && offset || 0, ii = 0;
+      buf = buf || [];
+      s.toLowerCase().replace(/[0-9a-f]{2}/g, function(oct) {
+        if (ii < 16) {
+          buf[i + ii++] = _hexToByte[oct];
+        }
+      });
+      while (ii < 16) {
+        buf[i + ii++] = 0;
+      }
+      return buf;
+    }
+    function unparse(buf, offset) {
+      var i = offset || 0, bth = _byteToHex;
+      return bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + '-' + bth[buf[i++]] + bth[buf[i++]] + '-' + bth[buf[i++]] + bth[buf[i++]] + '-' + bth[buf[i++]] + bth[buf[i++]] + '-' + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]];
+    }
+    var _seedBytes = _rng();
+    var _nodeId = [ _seedBytes[0] | 1, _seedBytes[1], _seedBytes[2], _seedBytes[3], _seedBytes[4], _seedBytes[5] ];
+    var _clockseq = (_seedBytes[6] << 8 | _seedBytes[7]) & 16383;
+    var _lastMSecs = 0, _lastNSecs = 0;
+    function v1(options, buf, offset) {
+      var i = buf && offset || 0;
+      var b = buf || [];
+      options = options || {};
+      var clockseq = options.clockseq != null ? options.clockseq : _clockseq;
+      var msecs = options.msecs != null ? options.msecs : new Date().getTime();
+      var nsecs = options.nsecs != null ? options.nsecs : _lastNSecs + 1;
+      var dt = msecs - _lastMSecs + (nsecs - _lastNSecs) / 1e4;
+      if (dt < 0 && options.clockseq == null) {
+        clockseq = clockseq + 1 & 16383;
+      }
+      if ((dt < 0 || msecs > _lastMSecs) && options.nsecs == null) {
+        nsecs = 0;
+      }
+      if (nsecs >= 1e4) {
+        throw new Error('uuid.v1(): Can\'t create more than 10M uuids/sec');
+      }
+      _lastMSecs = msecs;
+      _lastNSecs = nsecs;
+      _clockseq = clockseq;
+      msecs += 122192928e5;
+      var tl = ((msecs & 268435455) * 1e4 + nsecs) % 4294967296;
+      b[i++] = tl >>> 24 & 255;
+      b[i++] = tl >>> 16 & 255;
+      b[i++] = tl >>> 8 & 255;
+      b[i++] = tl & 255;
+      var tmh = msecs / 4294967296 * 1e4 & 268435455;
+      b[i++] = tmh >>> 8 & 255;
+      b[i++] = tmh & 255;
+      b[i++] = tmh >>> 24 & 15 | 16;
+      b[i++] = tmh >>> 16 & 255;
+      b[i++] = clockseq >>> 8 | 128;
+      b[i++] = clockseq & 255;
+      var node = options.node || _nodeId;
+      for (var n = 0; n < 6; n++) {
+        b[i + n] = node[n];
+      }
+      return buf ? buf : unparse(b);
+    }
+    function v4(options, buf, offset) {
+      var i = buf && offset || 0;
+      if (typeof options == 'string') {
+        buf = options == 'binary' ? new BufferClass(16) : null;
+        options = null;
+      }
+      options = options || {};
+      var rnds = options.random || (options.rng || _rng)();
+      rnds[6] = rnds[6] & 15 | 64;
+      rnds[8] = rnds[8] & 63 | 128;
+      if (buf) {
+        for (var ii = 0; ii < 16; ii++) {
+          buf[i + ii] = rnds[ii];
+        }
+      }
+      return buf || unparse(rnds);
+    }
+    uuid = v4;
+    uuid.v1 = v1;
+    uuid.v4 = v4;
+    uuid.parse = parse;
+    uuid.unparse = unparse;
+    uuid.BufferClass = BufferClass;
+  })(window);
+  'use strict';
+  axe._load({
+    data: {
+      rules: {
+        accesskeys: {
+          description: 'Ensures every accesskey attribute value is unique',
+          help: 'accesskey attribute value must be unique'
+        },
+        'area-alt': {
+          description: 'Ensures <area> elements of image maps have alternate text',
+          help: 'Active <area> elements must have alternate text'
+        },
+        'aria-allowed-attr': {
+          description: 'Ensures ARIA attributes are allowed for an element\'s role',
+          help: 'Elements must only use allowed ARIA attributes'
+        },
+        'aria-hidden-body': {
+          description: 'Ensures aria-hidden=\'true\' is not present on the document body.',
+          help: 'aria-hidden=\'true\' must not be present on the document body'
+        },
+        'aria-required-attr': {
+          description: 'Ensures elements with ARIA roles have all required ARIA attributes',
+          help: 'Required ARIA attributes must be provided'
+        },
+        'aria-required-children': {
+          description: 'Ensures elements with an ARIA role that require child roles contain them',
+          help: 'Certain ARIA roles must contain particular children'
+        },
+        'aria-required-parent': {
+          description: 'Ensures elements with an ARIA role that require parent roles are contained by them',
+          help: 'Certain ARIA roles must be contained by particular parents'
+        },
+        'aria-roles': {
+          description: 'Ensures all elements with a role attribute use a valid value',
+          help: 'ARIA roles used must conform to valid values'
+        },
+        'aria-valid-attr-value': {
+          description: 'Ensures all ARIA attributes have valid values',
+          help: 'ARIA attributes must conform to valid values'
+        },
+        'aria-valid-attr': {
+          description: 'Ensures attributes that begin with aria- are valid ARIA attributes',
+          help: 'ARIA attributes must conform to valid names'
+        },
+        'audio-caption': {
+          description: 'Ensures <audio> elements have captions',
+          help: '<audio> elements must have a captions track'
+        },
+        blink: {
+          description: 'Ensures <blink> elements are not used',
+          help: '<blink> elements are deprecated and must not be used'
+        },
+        'button-name': {
+          description: 'Ensures buttons have discernible text',
+          help: 'Buttons must have discernible text'
+        },
+        bypass: {
+          description: 'Ensures each page has at least one mechanism for a user to bypass navigation and jump straight to the content',
+          help: 'Page must have means to bypass repeated blocks'
+        },
+        checkboxgroup: {
+          description: 'Ensures related <input type="checkbox"> elements have a group and that that group designation is consistent',
+          help: 'Checkbox inputs with the same name attribute value must be part of a group'
+        },
+        'color-contrast': {
+          description: 'Ensures the contrast between foreground and background colors meets WCAG 2 AA contrast ratio thresholds',
+          help: 'Elements must have sufficient color contrast'
+        },
+        'definition-list': {
+          description: 'Ensures <dl> elements are structured correctly',
+          help: '<dl> elements must only directly contain properly-ordered <dt> and <dd> groups, <script> or <template> elements'
+        },
+        dlitem: {
+          description: 'Ensures <dt> and <dd> elements are contained by a <dl>',
+          help: '<dt> and <dd> elements must be contained by a <dl>'
+        },
+        'document-title': {
+          description: 'Ensures each HTML document contains a non-empty <title> element',
+          help: 'Documents must have <title> element to aid in navigation'
+        },
+        'duplicate-id': {
+          description: 'Ensures every id attribute value is unique',
+          help: 'id attribute value must be unique'
+        },
+        'empty-heading': {
+          description: 'Ensures headings have discernible text',
+          help: 'Headings must not be empty'
+        },
+        'frame-title-unique': {
+          description: 'Ensures <iframe> and <frame> elements contain a unique title attribute',
+          help: 'Frames must have a unique title attribute'
+        },
+        'frame-title': {
+          description: 'Ensures <iframe> and <frame> elements contain a non-empty title attribute',
+          help: 'Frames must have title attribute'
+        },
+        'heading-order': {
+          description: 'Ensures the order of headings is semantically correct',
+          help: 'Heading levels should only increase by one'
+        },
+        'hidden-content': {
+          description: 'Informs users about hidden content.',
+          help: 'Hidden content on the page cannot be analyzed'
+        },
+        'href-no-hash': {
+          description: 'Ensures that href values are valid link references to promote only using anchors as links',
+          help: 'Anchors must only be used as links with valid URLs or URL fragments'
+        },
+        'html-has-lang': {
+          description: 'Ensures every HTML document has a lang attribute',
+          help: '<html> element must have a lang attribute'
+        },
+        'html-lang-valid': {
+          description: 'Ensures the lang attribute of the <html> element has a valid value',
+          help: '<html> element must have a valid value for the lang attribute'
+        },
+        'image-alt': {
+          description: 'Ensures <img> elements have alternate text or a role of none or presentation',
+          help: 'Images must have alternate text'
+        },
+        'image-redundant-alt': {
+          description: 'Ensure button and link text is not repeated as image alternative',
+          help: 'Text of buttons and links should not be repeated in the image alternative'
+        },
+        'input-image-alt': {
+          description: 'Ensures <input type="image"> elements have alternate text',
+          help: 'Image buttons must have alternate text'
+        },
+        'label-title-only': {
+          description: 'Ensures that every form element is not solely labeled using the title or aria-describedby attributes',
+          help: 'Form elements should have a visible label'
+        },
+        label: {
+          description: 'Ensures every form element has a label',
+          help: 'Form elements must have labels'
+        },
+        'layout-table': {
+          description: 'Ensures presentational <table> elements do not use <th>, <caption> elements or the summary attribute',
+          help: 'Layout tables must not use data table elements'
+        },
+        'link-in-text-block': {
+          description: 'Links can be distinguished without relying on color',
+          help: 'Links must be distinguished from surrounding text in a way that does not rely on color'
+        },
+        'link-name': {
+          description: 'Ensures links have discernible text',
+          help: 'Links must have discernible text'
+        },
+        list: {
+          description: 'Ensures that lists are structured correctly',
+          help: '<ul> and <ol> must only directly contain <li>, <script> or <template> elements'
+        },
+        listitem: {
+          description: 'Ensures <li> elements are used semantically',
+          help: '<li> elements must be contained in a <ul> or <ol>'
+        },
+        marquee: {
+          description: 'Ensures <marquee> elements are not used',
+          help: '<marquee> elements are deprecated and must not be used'
+        },
+        'meta-refresh': {
+          description: 'Ensures <meta http-equiv="refresh"> is not used',
+          help: 'Timed refresh must not exist'
+        },
+        'meta-viewport-large': {
+          description: 'Ensures <meta name="viewport"> can scale a significant amount',
+          help: 'Users should be able to zoom and scale the text up to 500%'
+        },
+        'meta-viewport': {
+          description: 'Ensures <meta name="viewport"> does not disable text scaling and zooming',
+          help: 'Zooming and scaling must not be disabled'
+        },
+        'object-alt': {
+          description: 'Ensures <object> elements have alternate text',
+          help: '<object> elements must have alternate text'
+        },
+        'p-as-heading': {
+          description: 'Ensure p elements are not used to style headings',
+          help: 'Bold, italic text and font-size are not used to style p elements as a heading'
+        },
+        radiogroup: {
+          description: 'Ensures related <input type="radio"> elements have a group and that the group designation is consistent',
+          help: 'Radio inputs with the same name attribute value must be part of a group'
+        },
+        region: {
+          description: 'Ensures all content is contained within a landmark region',
+          help: 'Content should be contained in a landmark region'
+        },
+        'scope-attr-valid': {
+          description: 'Ensures the scope attribute is used correctly on tables',
+          help: 'scope attribute should be used correctly'
+        },
+        'server-side-image-map': {
+          description: 'Ensures that server-side image maps are not used',
+          help: 'Server-side image maps must not be used'
+        },
+        'skip-link': {
+          description: 'Ensures the first link on the page is a skip link',
+          help: 'The page should have a skip link as its first link'
+        },
+        tabindex: {
+          description: 'Ensures tabindex attribute values are not greater than 0',
+          help: 'Elements should not have tabindex greater than zero'
+        },
+        'table-duplicate-name': {
+          description: 'Ensure that tables do not have the same summary and caption',
+          help: 'The <caption> element should not contain the same text as the summary attribute'
+        },
+        'table-fake-caption': {
+          description: 'Ensure that tables with a caption use the <caption> element.',
+          help: 'Data or header cells should not be used to give caption to a data table.'
+        },
+        'td-has-header': {
+          description: 'Ensure that each non-empty data cell in a large table has one or more table headers',
+          help: 'All non-empty td element in table larger than 3 by 3 must have an associated table header'
+        },
+        'td-headers-attr': {
+          description: 'Ensure that each cell in a table using the headers refers to another cell in that table',
+          help: 'All cells in a table element that use the headers attribute must only refer to other cells of that same table'
+        },
+        'th-has-data-cells': {
+          description: 'Ensure that each table header in a data table refers to data cells',
+          help: 'All th element and elements with role=columnheader/rowheader must data cells which it describes'
+        },
+        'valid-lang': {
+          description: 'Ensures lang attributes have valid values',
+          help: 'lang attribute must have a valid value'
+        },
+        'video-caption': {
+          description: 'Ensures <video> elements have captions',
+          help: '<video> elements must have captions'
+        },
+        'video-description': {
+          description: 'Ensures <video> elements have audio descriptions',
+          help: '<video> elements must have an audio description track'
+        }
+      },
+      checks: {
+        accesskeys: {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Accesskey attribute value is unique';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Document has multiple elements with the same accesskey';
+              return out;
+            }
+          }
+        },
+        'non-empty-alt': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element has a non-empty alt attribute';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element has no alt attribute or the alt attribute is empty';
+              return out;
+            }
+          }
+        },
+        'non-empty-title': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element has a title attribute';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element has no title attribute or the title attribute is empty';
+              return out;
+            }
+          }
+        },
+        'aria-label': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'aria-label attribute exists and is not empty';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'aria-label attribute does not exist or is empty';
+              return out;
+            }
+          }
+        },
+        'aria-labelledby': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'aria-labelledby attribute exists and references elements that are visible to screen readers';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty or not visible';
+              return out;
+            }
+          }
+        },
+        'aria-allowed-attr': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'ARIA attributes are used correctly for the defined role';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'ARIA attribute' + (it.data && it.data.length > 1 ? 's are' : ' is') + ' not allowed:';
+              var arr1 = it.data;
+              if (arr1) {
+                var value, i1 = -1, l1 = arr1.length - 1;
+                while (i1 < l1) {
+                  value = arr1[i1 += 1];
+                  out += ' ' + value;
+                }
+              }
+              return out;
+            }
+          }
+        },
+        'aria-hidden-body': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'No aria-hidden attribute is present on document body';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'aria-hidden=true should not be present on the document body';
+              return out;
+            }
+          }
+        },
+        'aria-required-attr': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'All required ARIA attributes are present';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Required ARIA attribute' + (it.data && it.data.length > 1 ? 's' : '') + ' not present:';
+              var arr1 = it.data;
+              if (arr1) {
+                var value, i1 = -1, l1 = arr1.length - 1;
+                while (i1 < l1) {
+                  value = arr1[i1 += 1];
+                  out += ' ' + value;
+                }
+              }
+              return out;
+            }
+          }
+        },
+        'aria-required-children': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Required ARIA children are present';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Required ARIA ' + (it.data && it.data.length > 1 ? 'children' : 'child') + ' role not present:';
+              var arr1 = it.data;
+              if (arr1) {
+                var value, i1 = -1, l1 = arr1.length - 1;
+                while (i1 < l1) {
+                  value = arr1[i1 += 1];
+                  out += ' ' + value;
+                }
+              }
+              return out;
+            }
+          }
+        },
+        'aria-required-parent': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Required ARIA parent role present';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Required ARIA parent' + (it.data && it.data.length > 1 ? 's' : '') + ' role not present:';
+              var arr1 = it.data;
+              if (arr1) {
+                var value, i1 = -1, l1 = arr1.length - 1;
+                while (i1 < l1) {
+                  value = arr1[i1 += 1];
+                  out += ' ' + value;
+                }
+              }
+              return out;
+            }
+          }
+        },
+        invalidrole: {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'ARIA role is valid';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Role must be one of the valid ARIA roles';
+              return out;
+            }
+          }
+        },
+        abstractrole: {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Abstract roles are not used';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Abstract roles cannot be directly used';
+              return out;
+            }
+          }
+        },
+        'aria-valid-attr-value': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'ARIA attribute values are valid';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Invalid ARIA attribute value' + (it.data && it.data.length > 1 ? 's' : '') + ':';
+              var arr1 = it.data;
+              if (arr1) {
+                var value, i1 = -1, l1 = arr1.length - 1;
+                while (i1 < l1) {
+                  value = arr1[i1 += 1];
+                  out += ' ' + value;
+                }
+              }
+              return out;
+            }
+          }
+        },
+        'aria-valid-attr': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'ARIA attribute name' + (it.data && it.data.length > 1 ? 's' : '') + ' are valid';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Invalid ARIA attribute name' + (it.data && it.data.length > 1 ? 's' : '') + ':';
+              var arr1 = it.data;
+              if (arr1) {
+                var value, i1 = -1, l1 = arr1.length - 1;
+                while (i1 < l1) {
+                  value = arr1[i1 += 1];
+                  out += ' ' + value;
+                }
+              }
+              return out;
+            }
+          }
+        },
+        caption: {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'The multimedia element has a captions track';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'The multimedia element does not have a captions track';
+              return out;
+            },
+            incomplete: function anonymous(it) {
+              var out = 'A captions track for this element could not be found';
+              return out;
+            }
+          }
+        },
+        'is-on-screen': {
+          impact: 'minor',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element is not visible';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element is visible';
+              return out;
+            }
+          }
+        },
+        'non-empty-if-present': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element ';
+              if (it.data) {
+                out += 'has a non-empty value attribute';
+              } else {
+                out += 'does not have a value attribute';
+              }
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element has a value attribute and the value attribute is empty';
+              return out;
+            }
+          }
+        },
+        'non-empty-value': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element has a non-empty value attribute';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element has no value attribute or the value attribute is empty';
+              return out;
+            }
+          }
+        },
+        'button-has-visible-text': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element has inner text that is visible to screen readers';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element does not have inner text that is visible to screen readers';
+              return out;
+            }
+          }
+        },
+        'role-presentation': {
+          impact: 'moderate',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element\'s default semantics were overriden with role="presentation"';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element\'s default semantics were not overridden with role="presentation"';
+              return out;
+            }
+          }
+        },
+        'role-none': {
+          impact: 'moderate',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element\'s default semantics were overriden with role="none"';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element\'s default semantics were not overridden with role="none"';
+              return out;
+            }
+          }
+        },
+        'focusable-no-name': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element is not in tab order or has accessible text';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element is in tab order and does not have accessible text';
+              return out;
+            }
+          }
+        },
+        'internal-link-present': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Valid skip link found';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'No valid skip link found';
+              return out;
+            }
+          }
+        },
+        'header-present': {
+          impact: 'moderate',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Page has a header';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Page does not have a header';
+              return out;
+            }
+          }
+        },
+        landmark: {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Page has a landmark region';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Page does not have a landmark region';
+              return out;
+            }
+          }
+        },
+        'group-labelledby': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'All elements with the name "' + it.data.name + '" reference the same element with aria-labelledby';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'All elements with the name "' + it.data.name + '" do not reference the same element with aria-labelledby';
+              return out;
+            }
+          }
+        },
+        fieldset: {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element is contained in a fieldset';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = '';
+              var code = it.data && it.data.failureCode;
+              if (code === 'no-legend') {
+                out += 'Fieldset does not have a legend as its first child';
+              } else if (code === 'empty-legend') {
+                out += 'Legend does not have text that is visible to screen readers';
+              } else if (code === 'mixed-inputs') {
+                out += 'Fieldset contains unrelated inputs';
+              } else if (code === 'no-group-label') {
+                out += 'ARIA group does not have aria-label or aria-labelledby';
+              } else if (code === 'group-mixed-inputs') {
+                out += 'ARIA group contains unrelated inputs';
+              } else {
+                out += 'Element does not have a containing fieldset or ARIA group';
+              }
+              return out;
+            }
+          }
+        },
+        'color-contrast': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element has sufficient color contrast of ' + it.data.contrastRatio;
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element has insufficient color contrast of ' + it.data.contrastRatio + ' (foreground color: ' + it.data.fgColor + ', background color: ' + it.data.bgColor + ', font size: ' + it.data.fontSize + ', font weight: ' + it.data.fontWeight + ')';
+              return out;
+            },
+            incomplete: {
+              bgImage: 'Element\'s background color could not be determined due to a background image',
+              bgGradient: 'Element\'s background color could not be determined due to a background gradient',
+              imgNode: 'Element\'s background color could not be determined because element contains an image node',
+              bgOverlap: 'Element\'s background color could not be determined because it is overlapped by another element',
+              fgAlpha: 'Element\'s foreground color could not be determined because of alpha transparency',
+              elmPartiallyObscured: 'Element\'s background color could not be determined because it\'s partially obscured by another element',
+              equalRatio: 'Element has a 1:1 contrast ratio with the background',
+              default: 'Unable to determine contrast ratio'
+            }
+          }
+        },
+        'structured-dlitems': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'When not empty, element has both <dt> and <dd> elements';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'When not empty, element does not have at least one <dt> element followed by at least one <dd> element';
+              return out;
+            }
+          }
+        },
+        'only-dlitems': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'List element only has direct children that are allowed inside <dt> or <dd> elements';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'List element has direct children that are not allowed inside <dt> or <dd> elements';
+              return out;
+            }
+          }
+        },
+        dlitem: {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Description list item has a <dl> parent element';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Description list item does not have a <dl> parent element';
+              return out;
+            }
+          }
+        },
+        'doc-has-title': {
+          impact: 'moderate',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Document has a non-empty <title> element';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Document does not have a non-empty <title> element';
+              return out;
+            }
+          }
+        },
+        'duplicate-id': {
+          impact: 'moderate',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Document has no elements that share the same id attribute';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Document has multiple elements with the same id attribute: ' + it.data;
+              return out;
+            }
+          }
+        },
+        'has-visible-text': {
+          impact: 'moderate',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element has text that is visible to screen readers';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element does not have text that is visible to screen readers';
+              return out;
+            }
+          }
+        },
+        'unique-frame-title': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element\'s title attribute is unique';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element\'s title attribute is not unique';
+              return out;
+            }
+          }
+        },
+        'heading-order': {
+          impact: 'minor',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Heading order valid';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Heading order invalid';
+              return out;
+            }
+          }
+        },
+        'hidden-content': {
+          impact: 'minor',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'All content on the page has been analyzed.';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'There were problems analyzing the content on this page.';
+              return out;
+            },
+            incomplete: function anonymous(it) {
+              var out = 'There is hidden content on the page that was not analyzed. You will need to trigger the display of this content in order to analyze it.';
+              return out;
+            }
+          }
+        },
+        'href-no-hash': {
+          impact: 'moderate',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Anchor does not have an href value of #';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Anchor has an href value of #';
+              return out;
+            }
+          }
+        },
+        'has-lang': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'The <html> element has a lang attribute';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'The <html> element does not have a lang attribute';
+              return out;
+            }
+          }
+        },
+        'valid-lang': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Value of lang attribute is included in the list of valid languages';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Value of lang attribute not included in the list of valid languages';
+              return out;
+            }
+          }
+        },
+        'has-alt': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element has an alt attribute';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element does not have an alt attribute';
+              return out;
+            }
+          }
+        },
+        'duplicate-img-label': {
+          impact: 'minor',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element does not duplicate existing text in <img> alt text';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element contains <img> element with alt text that duplicates existing text';
+              return out;
+            }
+          }
+        },
+        'title-only': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Form element does not solely use title attribute for its label';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Only title used to generate label for form element';
+              return out;
+            }
+          }
+        },
+        'implicit-label': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Form element has an implicit (wrapped) <label>';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Form element does not have an implicit (wrapped) <label>';
+              return out;
+            }
+          }
+        },
+        'explicit-label': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Form element has an explicit <label>';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Form element does not have an explicit <label>';
+              return out;
+            }
+          }
+        },
+        'help-same-as-label': {
+          impact: 'minor',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Help text (title or aria-describedby) does not duplicate label text';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Help text (title or aria-describedby) text is the same as the label text';
+              return out;
+            }
+          }
+        },
+        'multiple-label': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Form element does not have multiple <label> elements';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Form element has multiple <label> elements';
+              return out;
+            }
+          }
+        },
+        'has-th': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Layout table does not use <th> elements';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Layout table uses <th> elements';
+              return out;
+            }
+          }
+        },
+        'has-caption': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Layout table does not use <caption> element';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Layout table uses <caption> element';
+              return out;
+            }
+          }
+        },
+        'has-summary': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Layout table does not use summary attribute';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Layout table uses summary attribute';
+              return out;
+            }
+          }
+        },
+        'link-in-text-block': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Links can be distinguished from surrounding text in a way that does not rely on color';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Links can not be distinguished from surrounding text in a way that does not rely on color';
+              return out;
+            },
+            incomplete: {
+              bgContrast: 'Element\'s contrast ratio could not be determined. Check for a distinct hover/focus style',
+              bgImage: 'Element\'s contrast ratio could not be determined due to a background image',
+              bgGradient: 'Element\'s contrast ratio could not be determined due to a background gradient',
+              imgNode: 'Element\'s contrast ratio could not be determined because element contains an image node',
+              bgOverlap: 'Element\'s contrast ratio could not be determined because of element overlap',
+              default: 'Unable to determine contrast ratio'
+            }
+          }
+        },
+        'only-listitems': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'List element only has direct children that are allowed inside <li> elements';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'List element has direct children that are not allowed inside <li> elements';
+              return out;
+            }
+          }
+        },
+        listitem: {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'List item has a <ul>, <ol> or role="list" parent element';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'List item does not have a <ul>, <ol> or role="list" parent element';
+              return out;
+            }
+          }
+        },
+        'meta-refresh': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = '<meta> tag does not immediately refresh the page';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = '<meta> tag forces timed refresh of page';
+              return out;
+            }
+          }
+        },
+        'meta-viewport-large': {
+          impact: 'minor',
+          messages: {
+            pass: function anonymous(it) {
+              var out = '<meta> tag does not prevent significant zooming';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = '<meta> tag limits zooming';
+              return out;
+            }
+          }
+        },
+        'meta-viewport': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = '<meta> tag does not disable zooming';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = '<meta> tag disables zooming';
+              return out;
+            }
+          }
+        },
+        'p-as-heading': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = '<p> elements are not styled as headings';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Heading elements should be used instead of styled p elements';
+              return out;
+            }
+          }
+        },
+        region: {
+          impact: 'moderate',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Content contained by ARIA landmark';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Content not contained by an ARIA landmark';
+              return out;
+            }
+          }
+        },
+        'html5-scope': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Scope attribute is only used on table header elements (<th>)';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'In HTML 5, scope attributes may only be used on table header elements (<th>)';
+              return out;
+            }
+          }
+        },
+        'scope-value': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Scope attribute is used correctly';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'The value of the scope attribute may only be \'row\' or \'col\'';
+              return out;
+            }
+          }
+        },
+        exists: {
+          impact: 'minor',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element does not exist';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element exists';
+              return out;
+            }
+          }
+        },
+        'skip-link': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Valid skip link found';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'No valid skip link found';
+              return out;
+            }
+          }
+        },
+        tabindex: {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Element does not have a tabindex greater than 0';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Element has a tabindex greater than 0';
+              return out;
+            }
+          }
+        },
+        'same-caption-summary': {
+          impact: 'moderate',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'Content of summary attribute and <caption> are not duplicated';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Content of summary attribute and <caption> element are identical';
+              return out;
+            }
+          }
+        },
+        'caption-faked': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'The first row of a table is not used as a caption';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'The first row of the table should be a caption instead of a table cell';
+              return out;
+            }
+          }
+        },
+        'td-has-header': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'All non-empty data cells have table headers';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Some non-empty data cells do not have table headers';
+              return out;
+            }
+          }
+        },
+        'td-headers-attr': {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'The headers attribute is exclusively used to refer to other cells in the table';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'The headers attribute is not exclusively used to refer to other cells in the table';
+              return out;
+            }
+          }
+        },
+        'th-has-data-cells': {
+          impact: 'critical',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'All table header cells refer to data cells';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'Not all table header cells refer to data cells';
+              return out;
+            },
+            incomplete: function anonymous(it) {
+              var out = 'Table data cells are missing or empty';
+              return out;
+            }
+          }
+        },
+        description: {
+          impact: 'serious',
+          messages: {
+            pass: function anonymous(it) {
+              var out = 'The multimedia element has an audio description track';
+              return out;
+            },
+            fail: function anonymous(it) {
+              var out = 'The multimedia element does not have an audio description track';
+              return out;
+            },
+            incomplete: function anonymous(it) {
+              var out = 'An audio description track for this element could not be found';
+              return out;
+            }
+          }
+        }
+      },
+      failureSummaries: {
+        any: {
+          failureMessage: function anonymous(it) {
+            var out = 'Fix any of the following:';
+            var arr1 = it;
+            if (arr1) {
+              var value, i1 = -1, l1 = arr1.length - 1;
+              while (i1 < l1) {
+                value = arr1[i1 += 1];
+                out += '\n  ' + value.split('\n').join('\n  ');
+              }
+            }
+            return out;
+          }
+        },
+        none: {
+          failureMessage: function anonymous(it) {
+            var out = 'Fix all of the following:';
+            var arr1 = it;
+            if (arr1) {
+              var value, i1 = -1, l1 = arr1.length - 1;
+              while (i1 < l1) {
+                value = arr1[i1 += 1];
+                out += '\n  ' + value.split('\n').join('\n  ');
+              }
+            }
+            return out;
+          }
+        }
+      },
+      incompleteFallbackMessage: function anonymous(it) {
+        var out = 'aXe couldn\'t tell the reason. Time to break out the element inspector!';
+        return out;
+      }
+    },
+    rules: [ {
+      id: 'accesskeys',
+      selector: '[accesskey]',
+      excludeHidden: false,
+      tags: [ 'wcag2a', 'wcag211', 'cat.keyboard' ],
+      all: [],
+      any: [],
+      none: [ 'accesskeys' ]
+    }, {
+      id: 'area-alt',
+      selector: 'map area[href]',
+      excludeHidden: false,
+      tags: [ 'cat.text-alternatives', 'wcag2a', 'wcag111', 'section508', 'section508.22.a' ],
+      all: [],
+      any: [ 'non-empty-alt', 'non-empty-title', 'aria-label', 'aria-labelledby' ],
+      none: []
+    }, {
+      id: 'aria-allowed-attr',
+      matches: function matches(node) {
+        var role = node.getAttribute('role');
+        if (!role) {
+          role = axe.commons.aria.implicitRole(node);
+        }
+        var allowed = axe.commons.aria.allowedAttr(role);
+        if (role && allowed) {
+          var aria = /^aria-/;
+          if (node.hasAttributes()) {
+            var attrs = node.attributes;
+            for (var i = 0, l = attrs.length; i < l; i++) {
+              if (aria.test(attrs[i].name)) {
+                return true;
+              }
+            }
+          }
+        }
+        return false;
+      },
+      tags: [ 'cat.aria', 'wcag2a', 'wcag411', 'wcag412' ],
+      all: [],
+      any: [ 'aria-allowed-attr' ],
+      none: []
+    }, {
+      id: 'aria-hidden-body',
+      selector: 'body',
+      excludeHidden: false,
+      tags: [ 'cat.aria', 'wcag2a', 'wcag412' ],
+      all: [],
+      any: [ 'aria-hidden-body' ],
+      none: []
+    }, {
+      id: 'aria-required-attr',
+      selector: '[role]',
+      tags: [ 'cat.aria', 'wcag2a', 'wcag411', 'wcag412' ],
+      all: [],
+      any: [ 'aria-required-attr' ],
+      none: []
+    }, {
+      id: 'aria-required-children',
+      selector: '[role]',
+      tags: [ 'cat.aria', 'wcag2a', 'wcag131' ],
+      all: [],
+      any: [ 'aria-required-children' ],
+      none: []
+    }, {
+      id: 'aria-required-parent',
+      selector: '[role]',
+      tags: [ 'cat.aria', 'wcag2a', 'wcag131' ],
+      all: [],
+      any: [ 'aria-required-parent' ],
+      none: []
+    }, {
+      id: 'aria-roles',
+      selector: '[role]',
+      tags: [ 'cat.aria', 'wcag2a', 'wcag131', 'wcag411', 'wcag412' ],
+      all: [],
+      any: [],
+      none: [ 'invalidrole', 'abstractrole' ]
+    }, {
+      id: 'aria-valid-attr-value',
+      matches: function matches(node) {
+        var aria = /^aria-/;
+        if (node.hasAttributes()) {
+          var attrs = node.attributes;
+          for (var i = 0, l = attrs.length; i < l; i++) {
+            if (aria.test(attrs[i].name)) {
+              return true;
+            }
+          }
+        }
+        return false;
+      },
+      tags: [ 'cat.aria', 'wcag2a', 'wcag131', 'wcag411', 'wcag412' ],
+      all: [],
+      any: [ {
+        options: [],
+        id: 'aria-valid-attr-value'
+      } ],
+      none: []
+    }, {
+      id: 'aria-valid-attr',
+      matches: function matches(node) {
+        var aria = /^aria-/;
+        if (node.hasAttributes()) {
+          var attrs = node.attributes;
+          for (var i = 0, l = attrs.length; i < l; i++) {
+            if (aria.test(attrs[i].name)) {
+              return true;
+            }
+          }
+        }
+        return false;
+      },
+      tags: [ 'cat.aria', 'wcag2a', 'wcag411' ],
+      all: [],
+      any: [ {
+        options: [],
+        id: 'aria-valid-attr'
+      } ],
+      none: []
+    }, {
+      id: 'audio-caption',
+      selector: 'audio',
+      excludeHidden: false,
+      tags: [ 'cat.time-and-media', 'wcag2a', 'wcag122', 'section508', 'section508.22.a' ],
+      all: [],
+      any: [],
+      none: [ 'caption' ]
+    }, {
+      id: 'blink',
+      selector: 'blink',
+      excludeHidden: false,
+      tags: [ 'cat.time-and-media', 'wcag2a', 'wcag222', 'section508', 'section508.22.j' ],
+      all: [],
+      any: [],
+      none: [ 'is-on-screen' ]
+    }, {
+      id: 'button-name',
+      selector: 'button, [role="button"], input[type="button"], input[type="submit"], input[type="reset"]',
+      tags: [ 'cat.name-role-value', 'wcag2a', 'wcag412', 'section508', 'section508.22.a' ],
+      all: [],
+      any: [ 'non-empty-if-present', 'non-empty-value', 'button-has-visible-text', 'aria-label', 'aria-labelledby', 'role-presentation', 'role-none' ],
+      none: [ 'focusable-no-name' ]
+    }, {
+      id: 'bypass',
+      selector: 'html',
+      pageLevel: true,
+      matches: function matches(node) {
+        return !!node.querySelector('a[href]');
+      },
+      tags: [ 'cat.keyboard', 'wcag2a', 'wcag241', 'section508', 'section508.22.o' ],
+      all: [],
+      any: [ 'internal-link-present', 'header-present', 'landmark' ],
+      none: []
+    }, {
+      id: 'checkboxgroup',
+      selector: 'input[type=checkbox][name]',
+      tags: [ 'cat.forms', 'best-practice' ],
+      all: [],
+      any: [ 'group-labelledby', 'fieldset' ],
+      none: []
+    }, {
+      id: 'color-contrast',
+      matches: function matches(node) {
+        var nodeName = node.nodeName.toUpperCase(), nodeType = node.type, doc = document;
+        if (node.getAttribute('aria-disabled') === 'true' || axe.commons.dom.findUp(node, '[aria-disabled="true"]')) {
+          return false;
+        }
+        if (nodeName === 'INPUT') {
+          return [ 'hidden', 'range', 'color', 'checkbox', 'radio', 'image' ].indexOf(nodeType) === -1 && !node.disabled;
+        }
+        if (nodeName === 'SELECT') {
+          return !!node.options.length && !node.disabled;
+        }
+        if (nodeName === 'TEXTAREA') {
+          return !node.disabled;
+        }
+        if (nodeName === 'OPTION') {
+          return false;
+        }
+        if (nodeName === 'BUTTON' && node.disabled || axe.commons.dom.findUp(node, 'button[disabled]')) {
+          return false;
+        }
+        if (nodeName === 'FIELDSET' && node.disabled || axe.commons.dom.findUp(node, 'fieldset[disabled]')) {
+          return false;
+        }
+        var nodeParentLabel = axe.commons.dom.findUp(node, 'label');
+        if (nodeName === 'LABEL' || nodeParentLabel) {
+          var relevantNode = node;
+          if (nodeParentLabel) {
+            relevantNode = nodeParentLabel;
+          }
+          var candidate = relevantNode.htmlFor && doc.getElementById(relevantNode.htmlFor);
+          if (candidate && candidate.disabled) {
+            return false;
+          }
+          var candidate = node.querySelector('input:not([type="hidden"]):not([type="image"])' + ':not([type="button"]):not([type="submit"]):not([type="reset"]), select, textarea');
+          if (candidate && candidate.disabled) {
+            return false;
+          }
+        }
+        if (node.id) {
+          var candidate = doc.querySelector('[aria-labelledby~=' + axe.commons.utils.escapeSelector(node.id) + ']');
+          if (candidate && candidate.disabled) {
+            return false;
+          }
+        }
+        if (axe.commons.text.visible(node, false, true) === '') {
+          return false;
+        }
+        var range = document.createRange(), childNodes = node.childNodes, length = childNodes.length, child, index;
+        for (index = 0; index < length; index++) {
+          child = childNodes[index];
+          if (child.nodeType === 3 && axe.commons.text.sanitize(child.nodeValue) !== '') {
+            range.selectNodeContents(child);
+          }
+        }
+        var rects = range.getClientRects();
+        length = rects.length;
+        for (index = 0; index < length; index++) {
+          if (axe.commons.dom.visuallyOverlaps(rects[index], node)) {
+            return true;
+          }
+        }
+        return false;
+      },
+      excludeHidden: false,
+      options: {
+        noScroll: false
+      },
+      tags: [ 'cat.color', 'wcag2aa', 'wcag143' ],
+      all: [],
+      any: [ 'color-contrast' ],
+      none: []
+    }, {
+      id: 'definition-list',
+      selector: 'dl',
+      matches: function matches(node) {
+        return !node.getAttribute('role');
+      },
+      tags: [ 'cat.structure', 'wcag2a', 'wcag131' ],
+      all: [],
+      any: [],
+      none: [ 'structured-dlitems', 'only-dlitems' ]
+    }, {
+      id: 'dlitem',
+      selector: 'dd, dt',
+      matches: function matches(node) {
+        return !node.getAttribute('role');
+      },
+      tags: [ 'cat.structure', 'wcag2a', 'wcag131' ],
+      all: [],
+      any: [ 'dlitem' ],
+      none: []
+    }, {
+      id: 'document-title',
+      selector: 'html',
+      matches: function matches(node) {
+        return node.ownerDocument.defaultView.self === node.ownerDocument.defaultView.top;
+      },
+      tags: [ 'cat.text-alternatives', 'wcag2a', 'wcag242' ],
+      all: [],
+      any: [ 'doc-has-title' ],
+      none: []
+    }, {
+      id: 'duplicate-id',
+      selector: '[id]',
+      excludeHidden: false,
+      tags: [ 'cat.parsing', 'wcag2a', 'wcag411' ],
+      all: [],
+      any: [ 'duplicate-id' ],
+      none: []
+    }, {
+      id: 'empty-heading',
+      selector: 'h1, h2, h3, h4, h5, h6, [role="heading"]',
+      enabled: true,
+      tags: [ 'cat.name-role-value', 'best-practice' ],
+      all: [],
+      any: [ 'has-visible-text', 'role-presentation', 'role-none' ],
+      none: []
+    }, {
+      id: 'frame-title-unique',
+      selector: 'frame[title], iframe[title]',
+      matches: function matches(node) {
+        var title = node.getAttribute('title');
+        return !!(title ? axe.commons.text.sanitize(title).trim() : '');
+      },
+      tags: [ 'cat.text-alternatives', 'best-practice' ],
+      all: [],
+      any: [],
+      none: [ 'unique-frame-title' ]
+    }, {
+      id: 'frame-title',
+      selector: 'frame, iframe',
+      tags: [ 'cat.text-alternatives', 'wcag2a', 'wcag241', 'section508', 'section508.22.i' ],
+      all: [],
+      any: [ 'aria-label', 'aria-labelledby', 'non-empty-title', 'role-presentation', 'role-none' ],
+      none: []
+    }, {
+      id: 'heading-order',
+      selector: 'h1,h2,h3,h4,h5,h6,[role=heading]',
+      enabled: false,
+      tags: [ 'cat.semantics', 'best-practice' ],
+      all: [],
+      any: [ 'heading-order' ],
+      none: []
+    }, {
+      id: 'hidden-content',
+      selector: '*',
+      excludeHidden: false,
+      tags: [ 'experimental', 'review-item' ],
+      all: [],
+      any: [ 'hidden-content' ],
+      none: [],
+      enabled: false
+    }, {
+      id: 'href-no-hash',
+      selector: 'a[href]',
+      enabled: false,
+      tags: [ 'cat.semantics', 'best-practice' ],
+      all: [],
+      any: [ 'href-no-hash' ],
+      none: []
+    }, {
+      id: 'html-has-lang',
+      selector: 'html',
+      tags: [ 'cat.language', 'wcag2a', 'wcag311' ],
+      all: [],
+      any: [ 'has-lang' ],
+      none: []
+    }, {
+      id: 'html-lang-valid',
+      selector: 'html[lang]',
+      tags: [ 'cat.language', 'wcag2a', 'wcag311' ],
+      all: [],
+      any: [],
+      none: [ 'valid-lang' ]
+    }, {
+      id: 'image-alt',
+      selector: 'img, [role=\'img\']',
+      tags: [ 'cat.text-alternatives', 'wcag2a', 'wcag111', 'section508', 'section508.22.a' ],
+      all: [],
+      any: [ 'has-alt', 'aria-label', 'aria-labelledby', 'non-empty-title', 'role-presentation', 'role-none' ],
+      none: []
+    }, {
+      id: 'image-redundant-alt',
+      selector: 'button, [role="button"], a[href], p, li, td, th',
+      tags: [ 'cat.text-alternatives', 'best-practice' ],
+      all: [],
+      any: [],
+      none: [ 'duplicate-img-label' ]
+    }, {
+      id: 'input-image-alt',
+      selector: 'input[type="image"]',
+      tags: [ 'cat.text-alternatives', 'wcag2a', 'wcag111', 'section508', 'section508.22.a' ],
+      all: [],
+      any: [ 'non-empty-alt', 'aria-label', 'aria-labelledby', 'non-empty-title' ],
+      none: []
+    }, {
+      id: 'label-title-only',
+      selector: 'input, select, textarea',
+      matches: function matches(node) {
+        if (node.nodeName.toLowerCase() !== 'input') {
+          return true;
+        }
+        var t = node.getAttribute('type').toLowerCase();
+        if (t === 'hidden' || t === 'image' || t === 'button' || t === 'submit' || t === 'reset') {
+          return false;
+        }
+        return true;
+      },
+      enabled: false,
+      tags: [ 'cat.forms', 'best-practice' ],
+      all: [],
+      any: [],
+      none: [ 'title-only' ]
+    }, {
+      id: 'label',
+      selector: 'input, select, textarea',
+      matches: function matches(node) {
+        if (node.nodeName.toLowerCase() !== 'input') {
+          return true;
+        }
+        var t = node.getAttribute('type').toLowerCase();
+        if (t === 'hidden' || t === 'image' || t === 'button' || t === 'submit' || t === 'reset') {
+          return false;
+        }
+        return true;
+      },
+      tags: [ 'cat.forms', 'wcag2a', 'wcag332', 'wcag131', 'section508', 'section508.22.n' ],
+      all: [],
+      any: [ 'aria-label', 'aria-labelledby', 'implicit-label', 'explicit-label', 'non-empty-title' ],
+      none: [ 'help-same-as-label', 'multiple-label' ]
+    }, {
+      id: 'layout-table',
+      selector: 'table',
+      matches: function matches(node) {
+        return !axe.commons.table.isDataTable(node);
+      },
+      tags: [ 'cat.semantics', 'wcag2a', 'wcag131' ],
+      all: [],
+      any: [],
+      none: [ 'has-th', 'has-caption', 'has-summary' ]
+    }, {
+      id: 'link-in-text-block',
+      selector: 'a[href], *[role=link]',
+      matches: function matches(node) {
+        var text = axe.commons.text.sanitize(node.textContent);
+        var role = node.getAttribute('role');
+        if (role && role !== 'link') {
+          return false;
+        }
+        if (!text) {
+          return false;
+        }
+        if (!axe.commons.dom.isVisible(node, false)) {
+          return false;
+        }
+        return axe.commons.dom.isInTextBlock(node);
+      },
+      excludeHidden: false,
+      tags: [ 'cat.color', 'experimental', 'wcag2a', 'wcag141' ],
+      all: [ 'link-in-text-block' ],
+      any: [],
+      none: []
+    }, {
+      id: 'link-name',
+      selector: 'a[href], [role=link][href]',
+      matches: function matches(node) {
+        return node.getAttribute('role') !== 'button';
+      },
+      tags: [ 'cat.name-role-value', 'wcag2a', 'wcag111', 'wcag412', 'section508', 'section508.22.a' ],
+      all: [],
+      any: [ 'has-visible-text', 'aria-label', 'aria-labelledby', 'role-presentation', 'role-none' ],
+      none: [ 'focusable-no-name' ]
+    }, {
+      id: 'list',
+      selector: 'ul, ol',
+      matches: function matches(node) {
+        return !node.getAttribute('role');
+      },
+      tags: [ 'cat.structure', 'wcag2a', 'wcag131' ],
+      all: [],
+      any: [],
+      none: [ 'only-listitems' ]
+    }, {
+      id: 'listitem',
+      selector: 'li',
+      matches: function matches(node) {
+        return !node.getAttribute('role');
+      },
+      tags: [ 'cat.structure', 'wcag2a', 'wcag131' ],
+      all: [],
+      any: [ 'listitem' ],
+      none: []
+    }, {
+      id: 'marquee',
+      selector: 'marquee',
+      excludeHidden: false,
+      tags: [ 'cat.parsing', 'wcag2a', 'wcag222' ],
+      all: [],
+      any: [],
+      none: [ 'is-on-screen' ]
+    }, {
+      id: 'meta-refresh',
+      selector: 'meta[http-equiv="refresh"]',
+      excludeHidden: false,
+      tags: [ 'cat.time', 'wcag2a', 'wcag2aaa', 'wcag221', 'wcag224', 'wcag325' ],
+      all: [],
+      any: [ 'meta-refresh' ],
+      none: []
+    }, {
+      id: 'meta-viewport-large',
+      selector: 'meta[name="viewport"]',
+      excludeHidden: false,
+      tags: [ 'cat.sensory-and-visual-cues', 'best-practice' ],
+      all: [],
+      any: [ {
+        options: {
+          scaleMinimum: 5,
+          lowerBound: 2
+        },
+        id: 'meta-viewport-large'
+      } ],
+      none: []
+    }, {
+      id: 'meta-viewport',
+      selector: 'meta[name="viewport"]',
+      excludeHidden: false,
+      tags: [ 'cat.sensory-and-visual-cues', 'wcag2aa', 'wcag144' ],
+      all: [],
+      any: [ {
+        options: {
+          scaleMinimum: 2
+        },
+        id: 'meta-viewport'
+      } ],
+      none: []
+    }, {
+      id: 'object-alt',
+      selector: 'object',
+      tags: [ 'cat.text-alternatives', 'wcag2a', 'wcag111', 'section508', 'section508.22.a' ],
+      all: [],
+      any: [ 'has-visible-text', 'aria-label', 'aria-labelledby', 'non-empty-title' ],
+      none: []
+    }, {
+      id: 'p-as-heading',
+      selector: 'p',
+      matches: function matches(node) {
+        var children = Array.from(node.parentNode.childNodes);
+        var nodeText = node.textContent.trim();
+        var isSentence = /[.!?:;](?![.!?:;])/g;
+        if (nodeText.length === 0 || (nodeText.match(isSentence) || []).length >= 2) {
+          return false;
+        }
+        var siblingsAfter = children.slice(children.indexOf(node) + 1).filter(function(elm) {
+          return elm.nodeName.toUpperCase() === 'P' && elm.textContent.trim() !== '';
+        });
+        return siblingsAfter.length !== 0;
+      },
+      tags: [ 'cat.semantics', 'wcag2a', 'wcag131', 'experimental' ],
+      all: [ {
+        options: {
+          margins: [ {
+            weight: 150,
+            italic: true
+          }, {
+            weight: 150,
+            size: 1.15
+          }, {
+            italic: true,
+            size: 1.15
+          }, {
+            size: 1.4
+          } ]
+        },
+        id: 'p-as-heading'
+      } ],
+      any: [],
+      none: []
+    }, {
+      id: 'radiogroup',
+      selector: 'input[type=radio][name]',
+      tags: [ 'cat.forms', 'best-practice' ],
+      all: [],
+      any: [ 'group-labelledby', 'fieldset' ],
+      none: []
+    }, {
+      id: 'region',
+      selector: 'html',
+      pageLevel: true,
+      enabled: false,
+      tags: [ 'cat.keyboard', 'best-practice' ],
+      all: [],
+      any: [ 'region' ],
+      none: []
+    }, {
+      id: 'scope-attr-valid',
+      selector: 'td[scope], th[scope]',
+      enabled: true,
+      tags: [ 'cat.tables', 'best-practice' ],
+      all: [ 'html5-scope', 'scope-value' ],
+      any: [],
+      none: []
+    }, {
+      id: 'server-side-image-map',
+      selector: 'img[ismap]',
+      tags: [ 'cat.text-alternatives', 'wcag2a', 'wcag211', 'section508', 'section508.22.f' ],
+      all: [],
+      any: [],
+      none: [ 'exists' ]
+    }, {
+      id: 'skip-link',
+      selector: 'a[href]',
+      pageLevel: true,
+      enabled: false,
+      tags: [ 'cat.keyboard', 'best-practice' ],
+      all: [],
+      any: [ 'skip-link' ],
+      none: []
+    }, {
+      id: 'tabindex',
+      selector: '[tabindex]',
+      tags: [ 'cat.keyboard', 'best-practice' ],
+      all: [],
+      any: [ 'tabindex' ],
+      none: []
+    }, {
+      id: 'table-duplicate-name',
+      selector: 'table',
+      tags: [ 'cat.tables', 'best-practice' ],
+      all: [],
+      any: [],
+      none: [ 'same-caption-summary' ]
+    }, {
+      id: 'table-fake-caption',
+      selector: 'table',
+      matches: function matches(node) {
+        return axe.commons.table.isDataTable(node);
+      },
+      tags: [ 'cat.tables', 'experimental', 'wcag2a', 'wcag131', 'section508', 'section508.22.g' ],
+      all: [ 'caption-faked' ],
+      any: [],
+      none: []
+    }, {
+      id: 'td-has-header',
+      selector: 'table',
+      matches: function matches(node) {
+        if (axe.commons.table.isDataTable(node)) {
+          var tableArray = axe.commons.table.toArray(node);
+          return tableArray.length >= 3 && tableArray[0].length >= 3 && tableArray[1].length >= 3 && tableArray[2].length >= 3;
+        }
+        return false;
+      },
+      tags: [ 'cat.tables', 'experimental', 'wcag2a', 'wcag131', 'section508', 'section508.22.g' ],
+      all: [ 'td-has-header' ],
+      any: [],
+      none: []
+    }, {
+      id: 'td-headers-attr',
+      selector: 'table',
+      tags: [ 'cat.tables', 'wcag2a', 'wcag131', 'section508', 'section508.22.g' ],
+      all: [ 'td-headers-attr' ],
+      any: [],
+      none: []
+    }, {
+      id: 'th-has-data-cells',
+      selector: 'table',
+      matches: function matches(node) {
+        return axe.commons.table.isDataTable(node);
+      },
+      tags: [ 'cat.tables', 'wcag2a', 'wcag131', 'section508', 'section508.22.g' ],
+      all: [ 'th-has-data-cells' ],
+      any: [],
+      none: []
+    }, {
+      id: 'valid-lang',
+      selector: '[lang], [xml\\:lang]',
+      matches: function matches(node) {
+        return node.nodeName.toLowerCase() !== 'html';
+      },
+      tags: [ 'cat.language', 'wcag2aa', 'wcag312' ],
+      all: [],
+      any: [],
+      none: [ 'valid-lang' ]
+    }, {
+      id: 'video-caption',
+      selector: 'video',
+      excludeHidden: false,
+      tags: [ 'cat.text-alternatives', 'wcag2a', 'wcag122', 'wcag123', 'section508', 'section508.22.a' ],
+      all: [],
+      any: [],
+      none: [ 'caption' ]
+    }, {
+      id: 'video-description',
+      selector: 'video',
+      excludeHidden: false,
+      tags: [ 'cat.text-alternatives', 'wcag2aa', 'wcag125', 'section508', 'section508.22.b' ],
+      all: [],
+      any: [],
+      none: [ 'description' ]
+    } ],
+    checks: [ {
+      id: 'abstractrole',
+      evaluate: function evaluate(node, options) {
+        return axe.commons.aria.getRoleType(node.getAttribute('role')) === 'abstract';
+      }
+    }, {
+      id: 'aria-allowed-attr',
+      evaluate: function evaluate(node, options) {
+        var invalid = [];
+        var attr, attrName, allowed, role = node.getAttribute('role'), attrs = node.attributes;
+        if (!role) {
+          role = axe.commons.aria.implicitRole(node);
+        }
+        allowed = axe.commons.aria.allowedAttr(role);
+        if (role && allowed) {
+          for (var i = 0, l = attrs.length; i < l; i++) {
+            attr = attrs[i];
+            attrName = attr.name;
+            if (axe.commons.aria.validateAttr(attrName) && allowed.indexOf(attrName) === -1) {
+              invalid.push(attrName + '="' + attr.nodeValue + '"');
+            }
+          }
+        }
+        if (invalid.length) {
+          this.data(invalid);
+          return false;
+        }
+        return true;
+      }
+    }, {
+      id: 'aria-hidden-body',
+      evaluate: function evaluate(node, options) {
+        return node.getAttribute('aria-hidden') !== 'true';
+      }
+    }, {
+      id: 'invalidrole',
+      evaluate: function evaluate(node, options) {
+        return !axe.commons.aria.isValidRole(node.getAttribute('role'));
+      }
+    }, {
+      id: 'aria-required-attr',
+      evaluate: function evaluate(node, options) {
+        var missing = [];
+        if (node.hasAttributes()) {
+          var attr, role = node.getAttribute('role'), required = axe.commons.aria.requiredAttr(role);
+          if (role && required) {
+            for (var i = 0, l = required.length; i < l; i++) {
+              attr = required[i];
+              if (!node.getAttribute(attr)) {
+                missing.push(attr);
+              }
+            }
+          }
+        }
+        if (missing.length) {
+          this.data(missing);
+          return false;
+        }
+        return true;
+      }
+    }, {
+      id: 'aria-required-children',
+      evaluate: function evaluate(node, options) {
+        var requiredOwned = axe.commons.aria.requiredOwned, implicitNodes = axe.commons.aria.implicitNodes, matchesSelector = axe.commons.utils.matchesSelector, idrefs = axe.commons.dom.idrefs;
+        function owns(node, role, ariaOwned) {
+          if (node === null) {
+            return false;
+          }
+          var implicit = implicitNodes(role), selector = [ '[role="' + role + '"]' ];
+          if (implicit) {
+            selector = selector.concat(implicit);
+          }
+          selector = selector.join(',');
+          return ariaOwned ? matchesSelector(node, selector) || !!node.querySelector(selector) : !!node.querySelector(selector);
+        }
+        function ariaOwns(nodes, role) {
+          var index, length;
+          for (index = 0, length = nodes.length; index < length; index++) {
+            if (nodes[index] === null) {
+              continue;
+            }
+            if (owns(nodes[index], role, true)) {
+              return true;
+            }
+          }
+          return false;
+        }
+        function missingRequiredChildren(node, childRoles, all) {
+          var i, l = childRoles.length, missing = [], ownedElements = idrefs(node, 'aria-owns');
+          for (i = 0; i < l; i++) {
+            var r = childRoles[i];
+            if (owns(node, r) || ariaOwns(ownedElements, r)) {
+              if (!all) {
+                return null;
+              }
+            } else {
+              if (all) {
+                missing.push(r);
+              }
+            }
+          }
+          if (missing.length) {
+            return missing;
+          }
+          if (!all && childRoles.length) {
+            return childRoles;
+          }
+          return null;
+        }
+        var role = node.getAttribute('role');
+        var required = requiredOwned(role);
+        if (!required) {
+          return true;
+        }
+        var all = false;
+        var childRoles = required.one;
+        if (!childRoles) {
+          var all = true;
+          childRoles = required.all;
+        }
+        var missing = missingRequiredChildren(node, childRoles, all);
+        if (!missing) {
+          return true;
+        }
+        this.data(missing);
+        return false;
+      }
+    }, {
+      id: 'aria-required-parent',
+      evaluate: function evaluate(node, options) {
+        function getSelector(role) {
+          var impliedNative = axe.commons.aria.implicitNodes(role) || [];
+          return impliedNative.concat('[role="' + role + '"]').join(',');
+        }
+        function getMissingContext(element, requiredContext, includeElement) {
+          var index, length, role = element.getAttribute('role'), missing = [];
+          if (!requiredContext) {
+            requiredContext = axe.commons.aria.requiredContext(role);
+          }
+          if (!requiredContext) {
+            return null;
+          }
+          for (index = 0, length = requiredContext.length; index < length; index++) {
+            if (includeElement && axe.utils.matchesSelector(element, getSelector(requiredContext[index]))) {
+              return null;
+            }
+            if (axe.commons.dom.findUp(element, getSelector(requiredContext[index]))) {
+              return null;
+            } else {
+              missing.push(requiredContext[index]);
+            }
+          }
+          return missing;
+        }
+        function getAriaOwners(element) {
+          var owners = [], o = null;
+          while (element) {
+            if (element.id) {
+              o = document.querySelector('[aria-owns~=' + axe.commons.utils.escapeSelector(element.id) + ']');
+              if (o) {
+                owners.push(o);
+              }
+            }
+            element = element.parentNode;
+          }
+          return owners.length ? owners : null;
+        }
+        var missingParents = getMissingContext(node);
+        if (!missingParents) {
+          return true;
+        }
+        var owners = getAriaOwners(node);
+        if (owners) {
+          for (var i = 0, l = owners.length; i < l; i++) {
+            missingParents = getMissingContext(owners[i], missingParents, true);
+            if (!missingParents) {
+              return true;
+            }
+          }
+        }
+        this.data(missingParents);
+        return false;
+      }
+    }, {
+      id: 'aria-valid-attr-value',
+      evaluate: function evaluate(node, options) {
+        options = Array.isArray(options) ? options : [];
+        var invalid = [], aria = /^aria-/;
+        var attr, attrName, attrs = node.attributes;
+        for (var i = 0, l = attrs.length; i < l; i++) {
+          attr = attrs[i];
+          attrName = attr.name;
+          if (options.indexOf(attrName) === -1 && aria.test(attrName) && !axe.commons.aria.validateAttrValue(node, attrName)) {
+            invalid.push(attrName + '="' + attr.nodeValue + '"');
+          }
+        }
+        if (invalid.length) {
+          this.data(invalid);
+          return false;
+        }
+        return true;
+      },
+      options: []
+    }, {
+      id: 'aria-valid-attr',
+      evaluate: function evaluate(node, options) {
+        options = Array.isArray(options) ? options : [];
+        var invalid = [], aria = /^aria-/;
+        var attr, attrs = node.attributes;
+        for (var i = 0, l = attrs.length; i < l; i++) {
+          attr = attrs[i].name;
+          if (options.indexOf(attr) === -1 && aria.test(attr) && !axe.commons.aria.validateAttr(attr)) {
+            invalid.push(attr);
+          }
+        }
+        if (invalid.length) {
+          this.data(invalid);
+          return false;
+        }
+        return true;
+      },
+      options: []
+    }, {
+      id: 'color-contrast',
+      evaluate: function evaluate(node, options) {
+        if (!axe.commons.dom.isVisible(node, false)) {
+          return true;
+        }
+        var noScroll = !!(options || {}).noScroll;
+        var bgNodes = [], bgColor = axe.commons.color.getBackgroundColor(node, bgNodes, noScroll), fgColor = axe.commons.color.getForegroundColor(node, noScroll);
+        var nodeStyle = window.getComputedStyle(node);
+        var fontSize = parseFloat(nodeStyle.getPropertyValue('font-size'));
+        var fontWeight = nodeStyle.getPropertyValue('font-weight');
+        var bold = [ 'bold', 'bolder', '600', '700', '800', '900' ].indexOf(fontWeight) !== -1;
+        var cr = axe.commons.color.hasValidContrastRatio(bgColor, fgColor, fontSize, bold);
+        var truncatedResult = Math.floor(cr.contrastRatio * 100) / 100;
+        var missing;
+        if (bgColor === null) {
+          missing = axe.commons.color.incompleteData.get('bgColor');
+        }
+        var equalRatio = false;
+        if (truncatedResult === 1) {
+          equalRatio = true;
+          missing = axe.commons.color.incompleteData.set('bgColor', 'equalRatio');
+        }
+        var data = {
+          fgColor: fgColor ? fgColor.toHexString() : undefined,
+          bgColor: bgColor ? bgColor.toHexString() : undefined,
+          contrastRatio: cr ? truncatedResult : undefined,
+          fontSize: (fontSize * 72 / 96).toFixed(1) + 'pt',
+          fontWeight: bold ? 'bold' : 'normal',
+          missingData: missing
+        };
+        this.data(data);
+        if (!cr.isValid || equalRatio) {
+          this.relatedNodes(bgNodes);
+        }
+        if (fgColor === null || bgColor === null || equalRatio) {
+          missing = null;
+          axe.commons.color.incompleteData.clear();
+          return undefined;
+        }
+        return cr.isValid;
+      }
+    }, {
+      id: 'link-in-text-block',
+      evaluate: function evaluate(node, options) {
+        var color = axe.commons.color;
+        function getContrast(color1, color2) {
+          var c1lum = color1.getRelativeLuminance();
+          var c2lum = color2.getRelativeLuminance();
+          return (Math.max(c1lum, c2lum) + .05) / (Math.min(c1lum, c2lum) + .05);
+        }
+        var blockLike = [ 'block', 'list-item', 'table', 'flex', 'grid', 'inline-block' ];
+        function isBlock(elm) {
+          var display = window.getComputedStyle(elm).getPropertyValue('display');
+          return blockLike.indexOf(display) !== -1 || display.substr(0, 6) === 'table-';
+        }
+        if (isBlock(node)) {
+          return false;
+        }
+        var parentBlock = node.parentNode;
+        while (parentBlock.nodeType === 1 && !isBlock(parentBlock)) {
+          parentBlock = parentBlock.parentNode;
+        }
+        if (color.elementIsDistinct(node, parentBlock)) {
+          return true;
+        } else {
+          var nodeColor, parentColor;
+          nodeColor = color.getForegroundColor(node);
+          parentColor = color.getForegroundColor(parentBlock);
+          if (!nodeColor || !parentColor) {
+            return undefined;
+          }
+          var contrast = getContrast(nodeColor, parentColor);
+          if (contrast === 1) {
+            return true;
+          } else if (contrast >= 3) {
+            axe.commons.color.incompleteData.set('fgColor', 'bgContrast');
+            this.data({
+              missingData: axe.commons.color.incompleteData.get('fgColor')
+            });
+            axe.commons.color.incompleteData.clear();
+            return undefined;
+          }
+          nodeColor = color.getBackgroundColor(node);
+          parentColor = color.getBackgroundColor(parentBlock);
+          if (!nodeColor || !parentColor || getContrast(nodeColor, parentColor) >= 3) {
+            var reason = void 0;
+            if (!nodeColor || !parentColor) {
+              reason = axe.commons.color.incompleteData.get('bgColor');
+            } else {
+              reason = 'bgContrast';
+            }
+            axe.commons.color.incompleteData.set('fgColor', reason);
+            this.data({
+              missingData: axe.commons.color.incompleteData.get('fgColor')
+            });
+            axe.commons.color.incompleteData.clear();
+            return undefined;
+          }
+        }
+        return false;
+      }
+    }, {
+      id: 'fieldset',
+      evaluate: function evaluate(node, options) {
+        var failureCode, self = this;
+        function getUnrelatedElements(parent, name) {
+          return axe.commons.utils.toArray(parent.querySelectorAll('select,textarea,button,input:not([name="' + name + '"]):not([type="hidden"])'));
+        }
+        function checkFieldset(group, name) {
+          var firstNode = group.firstElementChild;
+          if (!firstNode || firstNode.nodeName.toUpperCase() !== 'LEGEND') {
+            self.relatedNodes([ group ]);
+            failureCode = 'no-legend';
+            return false;
+          }
+          if (!axe.commons.text.accessibleText(firstNode)) {
+            self.relatedNodes([ firstNode ]);
+            failureCode = 'empty-legend';
+            return false;
+          }
+          var otherElements = getUnrelatedElements(group, name);
+          if (otherElements.length) {
+            self.relatedNodes(otherElements);
+            failureCode = 'mixed-inputs';
+            return false;
+          }
+          return true;
+        }
+        function checkARIAGroup(group, name) {
+          var hasLabelledByText = axe.commons.dom.idrefs(group, 'aria-labelledby').some(function(element) {
+            return element && axe.commons.text.accessibleText(element);
+          });
+          var ariaLabel = group.getAttribute('aria-label');
+          if (!hasLabelledByText && !(ariaLabel && axe.commons.text.sanitize(ariaLabel))) {
+            self.relatedNodes(group);
+            failureCode = 'no-group-label';
+            return false;
+          }
+          var otherElements = getUnrelatedElements(group, name);
+          if (otherElements.length) {
+            self.relatedNodes(otherElements);
+            failureCode = 'group-mixed-inputs';
+            return false;
+          }
+          return true;
+        }
+        function spliceCurrentNode(nodes, current) {
+          return axe.commons.utils.toArray(nodes).filter(function(candidate) {
+            return candidate !== current;
+          });
+        }
+        function runCheck(element) {
+          var name = axe.commons.utils.escapeSelector(node.name);
+          var matchingNodes = document.querySelectorAll('input[type="' + axe.commons.utils.escapeSelector(node.type) + '"][name="' + name + '"]');
+          if (matchingNodes.length < 2) {
+            return true;
+          }
+          var fieldset = axe.commons.dom.findUp(element, 'fieldset');
+          var group = axe.commons.dom.findUp(element, '[role="group"]' + (node.type === 'radio' ? ',[role="radiogroup"]' : ''));
+          if (!group && !fieldset) {
+            failureCode = 'no-group';
+            self.relatedNodes(spliceCurrentNode(matchingNodes, element));
+            return false;
+          }
+          return fieldset ? checkFieldset(fieldset, name) : checkARIAGroup(group, name);
+        }
+        var data = {
+          name: node.getAttribute('name'),
+          type: node.getAttribute('type')
+        };
+        var result = runCheck(node);
+        if (!result) {
+          data.failureCode = failureCode;
+        }
+        this.data(data);
+        return result;
+      },
+      after: function after(results, options) {
+        var seen = {};
+        return results.filter(function(result) {
+          if (result.result) {
+            return true;
+          }
+          var data = result.data;
+          if (data) {
+            seen[data.type] = seen[data.type] || {};
+            if (!seen[data.type][data.name]) {
+              seen[data.type][data.name] = [ data ];
+              return true;
+            }
+            var hasBeenSeen = seen[data.type][data.name].some(function(candidate) {
+              return candidate.failureCode === data.failureCode;
+            });
+            if (!hasBeenSeen) {
+              seen[data.type][data.name].push(data);
+            }
+            return !hasBeenSeen;
+          }
+          return false;
+        });
+      }
+    }, {
+      id: 'group-labelledby',
+      evaluate: function evaluate(node, options) {
+        this.data({
+          name: node.getAttribute('name'),
+          type: node.getAttribute('type')
+        });
+        var matchingNodes = document.querySelectorAll('input[type="' + axe.commons.utils.escapeSelector(node.type) + '"][name="' + axe.commons.utils.escapeSelector(node.name) + '"]');
+        if (matchingNodes.length <= 1) {
+          return true;
+        }
+        return [].map.call(matchingNodes, function(m) {
+          var l = m.getAttribute('aria-labelledby');
+          return l ? l.split(/\s+/) : [];
+        }).reduce(function(prev, curr) {
+          return prev.filter(function(n) {
+            return curr.indexOf(n) !== -1;
+          });
+        }).filter(function(n) {
+          var labelNode = document.getElementById(n);
+          return labelNode && axe.commons.text.accessibleText(labelNode);
+        }).length !== 0;
+      },
+      after: function after(results, options) {
+        var seen = {};
+        return results.filter(function(result) {
+          var data = result.data;
+          if (data) {
+            seen[data.type] = seen[data.type] || {};
+            if (!seen[data.type][data.name]) {
+              seen[data.type][data.name] = true;
+              return true;
+            }
+          }
+          return false;
+        });
+      }
+    }, {
+      id: 'accesskeys',
+      evaluate: function evaluate(node, options) {
+        if (axe.commons.dom.isVisible(node, false)) {
+          this.data(node.getAttribute('accesskey'));
+          this.relatedNodes([ node ]);
+        }
+        return true;
+      },
+      after: function after(results, options) {
+        var seen = {};
+        return results.filter(function(r) {
+          if (!r.data) {
+            return false;
+          }
+          var key = r.data.toUpperCase();
+          if (!seen[key]) {
+            seen[key] = r;
+            r.relatedNodes = [];
+            return true;
+          }
+          seen[key].relatedNodes.push(r.relatedNodes[0]);
+          return false;
+        }).map(function(r) {
+          r.result = !!r.relatedNodes.length;
+          return r;
+        });
+      }
+    }, {
+      id: 'focusable-no-name',
+      evaluate: function evaluate(node, options) {
+        var tabIndex = node.getAttribute('tabindex'), isFocusable = axe.commons.dom.isFocusable(node) && tabIndex > -1;
+        if (!isFocusable) {
+          return false;
+        }
+        return !axe.commons.text.accessibleText(node);
+      }
+    }, {
+      id: 'tabindex',
+      evaluate: function evaluate(node, options) {
+        return node.tabIndex <= 0;
+      }
+    }, {
+      id: 'duplicate-img-label',
+      evaluate: function evaluate(node, options) {
+        var imgs = node.querySelectorAll('img');
+        var text = axe.commons.text.visible(node, true).toLowerCase();
+        if (text === '') {
+          return false;
+        }
+        for (var i = 0, len = imgs.length; i < len; i++) {
+          var img = imgs[i];
+          var imgAlt = axe.commons.text.accessibleText(img).toLowerCase();
+          if (imgAlt === text && img.getAttribute('role') !== 'presentation' && axe.commons.dom.isVisible(img)) {
+            return true;
+          }
+        }
+        return false;
+      }
+    }, {
+      id: 'explicit-label',
+      evaluate: function evaluate(node, options) {
+        if (node.id) {
+          var label = document.querySelector('label[for="' + axe.commons.utils.escapeSelector(node.id) + '"]');
+          if (label) {
+            return !!axe.commons.text.accessibleText(label);
+          }
+        }
+        return false;
+      }
+    }, {
+      id: 'help-same-as-label',
+      evaluate: function evaluate(node, options) {
+        var labelText = axe.commons.text.label(node), check = node.getAttribute('title');
+        if (!labelText) {
+          return false;
+        }
+        if (!check) {
+          check = '';
+          if (node.getAttribute('aria-describedby')) {
+            var ref = axe.commons.dom.idrefs(node, 'aria-describedby');
+            check = ref.map(function(thing) {
+              return thing ? axe.commons.text.accessibleText(thing) : '';
+            }).join('');
+          }
+        }
+        return axe.commons.text.sanitize(check) === axe.commons.text.sanitize(labelText);
+      },
+      enabled: false
+    }, {
+      id: 'implicit-label',
+      evaluate: function evaluate(node, options) {
+        var label = axe.commons.dom.findUp(node, 'label');
+        if (label) {
+          return !!axe.commons.text.accessibleText(label);
+        }
+        return false;
+      }
+    }, {
+      id: 'multiple-label',
+      evaluate: function evaluate(node, options) {
+        var labels = [].slice.call(document.querySelectorAll('label[for="' + axe.commons.utils.escapeSelector(node.id) + '"]')), parent = node.parentNode;
+        if (labels.length) {
+          labels = labels.filter(function(label, index) {
+            if (index === 0 && !axe.commons.dom.isVisible(label, true) || axe.commons.dom.isVisible(label, true)) {
+              return label;
+            }
+          });
+        }
+        while (parent) {
+          if (parent.tagName === 'LABEL' && labels.indexOf(parent) === -1) {
+            labels.push(parent);
+          }
+          parent = parent.parentNode;
+        }
+        this.relatedNodes(labels);
+        return labels.length > 1;
+      }
+    }, {
+      id: 'title-only',
+      evaluate: function evaluate(node, options) {
+        var labelText = axe.commons.text.label(node);
+        return !labelText && !!(node.getAttribute('title') || node.getAttribute('aria-describedby'));
+      }
+    }, {
+      id: 'has-lang',
+      evaluate: function evaluate(node, options) {
+        return !!(node.getAttribute('lang') || node.getAttribute('xml:lang') || '').trim();
+      }
+    }, {
+      id: 'valid-lang',
+      evaluate: function evaluate(node, options) {
+        function getBaseLang(lang) {
+          return lang.trim().split('-')[0].toLowerCase();
+        }
+        var langs, invalid;
+        langs = (options ? options : axe.commons.utils.validLangs()).map(getBaseLang);
+        invalid = [ 'lang', 'xml:lang' ].reduce(function(invalid, langAttr) {
+          var langVal = node.getAttribute(langAttr);
+          if (typeof langVal !== 'string') {
+            return invalid;
+          }
+          var baselangVal = getBaseLang(langVal);
+          if (baselangVal !== '' && langs.indexOf(baselangVal) === -1) {
+            invalid.push(langAttr + '="' + node.getAttribute(langAttr) + '"');
+          }
+          return invalid;
+        }, []);
+        if (invalid.length) {
+          this.data(invalid);
+          return true;
+        }
+        return false;
+      }
+    }, {
+      id: 'dlitem',
+      evaluate: function evaluate(node, options) {
+        return node.parentNode.tagName === 'DL';
+      }
+    }, {
+      id: 'has-listitem',
+      evaluate: function evaluate(node, options) {
+        var children = node.children;
+        if (children.length === 0) {
+          return true;
+        }
+        for (var i = 0; i < children.length; i++) {
+          if (children[i].nodeName.toUpperCase() === 'LI') {
+            return false;
+          }
+        }
+        return true;
+      }
+    }, {
+      id: 'listitem',
+      evaluate: function evaluate(node, options) {
+        if ([ 'UL', 'OL' ].indexOf(node.parentNode.nodeName.toUpperCase()) !== -1) {
+          return true;
+        }
+        return node.parentNode.getAttribute('role') === 'list';
+      }
+    }, {
+      id: 'only-dlitems',
+      evaluate: function evaluate(node, options) {
+        var child, nodeName, bad = [], children = node.childNodes, permitted = [ 'STYLE', 'META', 'LINK', 'MAP', 'AREA', 'SCRIPT', 'DATALIST', 'TEMPLATE' ], hasNonEmptyTextNode = false;
+        for (var i = 0; i < children.length; i++) {
+          child = children[i];
+          var nodeName = child.nodeName.toUpperCase();
+          if (child.nodeType === 1 && nodeName !== 'DT' && nodeName !== 'DD' && permitted.indexOf(nodeName) === -1) {
+            bad.push(child);
+          } else if (child.nodeType === 3 && child.nodeValue.trim() !== '') {
+            hasNonEmptyTextNode = true;
+          }
+        }
+        if (bad.length) {
+          this.relatedNodes(bad);
+        }
+        var retVal = !!bad.length || hasNonEmptyTextNode;
+        return retVal;
+      }
+    }, {
+      id: 'only-listitems',
+      evaluate: function evaluate(node, options) {
+        var child, nodeName, bad = [], children = node.childNodes, permitted = [ 'STYLE', 'META', 'LINK', 'MAP', 'AREA', 'SCRIPT', 'DATALIST', 'TEMPLATE' ], hasNonEmptyTextNode = false;
+        for (var i = 0; i < children.length; i++) {
+          child = children[i];
+          nodeName = child.nodeName.toUpperCase();
+          if (child.nodeType === 1 && nodeName !== 'LI' && permitted.indexOf(nodeName) === -1) {
+            bad.push(child);
+          } else if (child.nodeType === 3 && child.nodeValue.trim() !== '') {
+            hasNonEmptyTextNode = true;
+          }
+        }
+        if (bad.length) {
+          this.relatedNodes(bad);
+        }
+        return !!bad.length || hasNonEmptyTextNode;
+      }
+    }, {
+      id: 'structured-dlitems',
+      evaluate: function evaluate(node, options) {
+        var children = node.children;
+        if (!children || !children.length) {
+          return false;
+        }
+        var hasDt = false, hasDd = false, nodeName;
+        for (var i = 0; i < children.length; i++) {
+          nodeName = children[i].nodeName.toUpperCase();
+          if (nodeName === 'DT') {
+            hasDt = true;
+          }
+          if (hasDt && nodeName === 'DD') {
+            return false;
+          }
+          if (nodeName === 'DD') {
+            hasDd = true;
+          }
+        }
+        return hasDt || hasDd;
+      }
+    }, {
+      id: 'caption',
+      evaluate: function evaluate(node, options) {
+        var tracks = node.querySelectorAll('track');
+        if (tracks.length) {
+          for (var i = 0; i < tracks.length; i++) {
+            var kind = tracks[i].getAttribute('kind');
+            if (kind && kind === 'captions') {
+              return false;
+            }
+          }
+          return true;
+        }
+        return undefined;
+      }
+    }, {
+      id: 'description',
+      evaluate: function evaluate(node, options) {
+        var tracks = node.querySelectorAll('track');
+        if (tracks.length) {
+          for (var i = 0; i < tracks.length; i++) {
+            var kind = tracks[i].getAttribute('kind');
+            if (kind && kind === 'descriptions') {
+              return false;
+            }
+          }
+          return true;
+        }
+        return undefined;
+      }
+    }, {
+      id: 'meta-viewport-large',
+      evaluate: function evaluate(node, options) {
+        options = options || {};
+        var params, content = node.getAttribute('content') || '', parsedParams = content.split(/[;,]/), result = {}, minimum = options.scaleMinimum || 2, lowerBound = options.lowerBound || false;
+        for (var i = 0, l = parsedParams.length; i < l; i++) {
+          params = parsedParams[i].split('=');
+          var key = params.shift().toLowerCase();
+          if (key && params.length) {
+            result[key.trim()] = params.shift().trim().toLowerCase();
+          }
+        }
+        if (lowerBound && result['maximum-scale'] && parseFloat(result['maximum-scale']) < lowerBound) {
+          return true;
+        }
+        if (!lowerBound && result['user-scalable'] === 'no') {
+          return false;
+        }
+        if (result['maximum-scale'] && parseFloat(result['maximum-scale']) < minimum) {
+          return false;
+        }
+        return true;
+      },
+      options: {
+        scaleMinimum: 5,
+        lowerBound: 2
+      }
+    }, {
+      id: 'meta-viewport',
+      evaluate: function evaluate(node, options) {
+        options = options || {};
+        var params, content = node.getAttribute('content') || '', parsedParams = content.split(/[;,]/), result = {}, minimum = options.scaleMinimum || 2, lowerBound = options.lowerBound || false;
+        for (var i = 0, l = parsedParams.length; i < l; i++) {
+          params = parsedParams[i].split('=');
+          var key = params.shift().toLowerCase();
+          if (key && params.length) {
+            result[key.trim()] = params.shift().trim().toLowerCase();
+          }
+        }
+        if (lowerBound && result['maximum-scale'] && parseFloat(result['maximum-scale']) < lowerBound) {
+          return true;
+        }
+        if (!lowerBound && result['user-scalable'] === 'no') {
+          return false;
+        }
+        if (result['maximum-scale'] && parseFloat(result['maximum-scale']) < minimum) {
+          return false;
+        }
+        return true;
+      },
+      options: {
+        scaleMinimum: 2
+      }
+    }, {
+      id: 'header-present',
+      evaluate: function evaluate(node, options) {
+        return !!node.querySelector('h1, h2, h3, h4, h5, h6, [role="heading"]');
+      }
+    }, {
+      id: 'heading-order',
+      evaluate: function evaluate(node, options) {
+        var ariaHeadingLevel = node.getAttribute('aria-level');
+        if (ariaHeadingLevel !== null) {
+          this.data(parseInt(ariaHeadingLevel, 10));
+          return true;
+        }
+        var headingLevel = node.tagName.match(/H(\d)/);
+        if (headingLevel) {
+          this.data(parseInt(headingLevel[1], 10));
+          return true;
+        }
+        return true;
+      },
+      after: function after(results, options) {
+        if (results.length < 2) {
+          return results;
+        }
+        var prevLevel = results[0].data;
+        for (var i = 1; i < results.length; i++) {
+          if (results[i].result && results[i].data > prevLevel + 1) {
+            results[i].result = false;
+          }
+          prevLevel = results[i].data;
+        }
+        return results;
+      }
+    }, {
+      id: 'href-no-hash',
+      evaluate: function evaluate(node, options) {
+        var href = node.getAttribute('href');
+        if (href === '#') {
+          return false;
+        }
+        return true;
+      }
+    }, {
+      id: 'internal-link-present',
+      evaluate: function evaluate(node, options) {
+        return !!node.querySelector('a[href^="#"]');
+      }
+    }, {
+      id: 'landmark',
+      evaluate: function evaluate(node, options) {
+        return node.getElementsByTagName('main').length > 0 || !!node.querySelector('[role="main"]');
+      }
+    }, {
+      id: 'meta-refresh',
+      evaluate: function evaluate(node, options) {
+        var content = node.getAttribute('content') || '', parsedParams = content.split(/[;,]/);
+        return content === '' || parsedParams[0] === '0';
+      }
+    }, {
+      id: 'p-as-heading',
+      evaluate: function evaluate(node, options) {
+        var siblings = Array.from(node.parentNode.children);
+        var currentIndex = siblings.indexOf(node);
+        options = options || {};
+        var margins = options.margins || [];
+        var nextSibling = siblings.slice(currentIndex + 1).find(function(elm) {
+          return elm.nodeName.toUpperCase() === 'P';
+        });
+        var prevSibling = siblings.slice(0, currentIndex).reverse().find(function(elm) {
+          return elm.nodeName.toUpperCase() === 'P';
+        });
+        function getTextContainer(elm) {
+          var nextNode = elm;
+          var outerText = elm.textContent.trim();
+          var innerText = outerText;
+          while (innerText === outerText && nextNode !== undefined) {
+            var i = -1;
+            elm = nextNode;
+            if (elm.children.length === 0) {
+              return elm;
+            }
+            do {
+              i++;
+              innerText = elm.children[i].textContent.trim();
+            } while (innerText === '' && i + 1 < elm.children.length);
+            nextNode = elm.children[i];
+          }
+          return elm;
+        }
+        function normalizeFontWeight(weight) {
+          switch (weight) {
+           case 'lighter':
+            return 100;
+
+           case 'normal':
+            return 400;
+
+           case 'bold':
+            return 700;
+
+           case 'bolder':
+            return 900;
+          }
+          weight = parseInt(weight);
+          return !isNaN(weight) ? weight : 400;
+        }
+        function getStyleValues(node) {
+          var style = window.getComputedStyle(getTextContainer(node));
+          return {
+            fontWeight: normalizeFontWeight(style.getPropertyValue('font-weight')),
+            fontSize: parseInt(style.getPropertyValue('font-size')),
+            isItalic: style.getPropertyValue('font-style') === 'italic'
+          };
+        }
+        function isHeaderStyle(styleA, styleB, margins) {
+          return margins.reduce(function(out, margin) {
+            return out || (!margin.size || styleA.fontSize / margin.size > styleB.fontSize) && (!margin.weight || styleA.fontWeight - margin.weight > styleB.fontWeight) && (!margin.italic || styleA.isItalic && !styleB.isItalic);
+          }, false);
+        }
+        var currStyle = getStyleValues(node);
+        var nextStyle = nextSibling ? getStyleValues(nextSibling) : null;
+        var prevStyle = prevSibling ? getStyleValues(prevSibling) : null;
+        if (!nextStyle || !isHeaderStyle(currStyle, nextStyle, margins)) {
+          return true;
+        }
+        var blockquote = axe.commons.dom.findUp(node, 'blockquote');
+        if (blockquote && blockquote.nodeName.toUpperCase() === 'BLOCKQUOTE') {
+          return undefined;
+        }
+        if (prevStyle && !isHeaderStyle(currStyle, prevStyle, margins)) {
+          return undefined;
+        }
+        return false;
+      },
+      options: {
+        margins: [ {
+          weight: 150,
+          italic: true
+        }, {
+          weight: 150,
+          size: 1.15
+        }, {
+          italic: true,
+          size: 1.15
+        }, {
+          size: 1.4
+        } ]
+      }
+    }, {
+      id: 'region',
+      evaluate: function evaluate(node, options) {
+        var landmarkRoles = axe.commons.aria.getRolesByType('landmark'), firstLink = node.querySelector('a[href]');
+        function isSkipLink(n) {
+          return firstLink && axe.commons.dom.isFocusable(axe.commons.dom.getElementByReference(firstLink, 'href')) && firstLink === n;
+        }
+        function isLandmark(n) {
+          var role = n.getAttribute('role');
+          return role && landmarkRoles.indexOf(role) !== -1;
+        }
+        function checkRegion(n) {
+          if (isLandmark(n)) {
+            return null;
+          }
+          if (isSkipLink(n)) {
+            return getViolatingChildren(n);
+          }
+          if (axe.commons.dom.isVisible(n, true) && (axe.commons.text.visible(n, true, true) || axe.commons.dom.isVisualContent(n))) {
+            return n;
+          }
+          return getViolatingChildren(n);
+        }
+        function getViolatingChildren(n) {
+          var children = axe.commons.utils.toArray(n.children);
+          if (children.length === 0) {
+            return [];
+          }
+          return children.map(checkRegion).filter(function(c) {
+            return c !== null;
+          }).reduce(function(a, b) {
+            return a.concat(b);
+          }, []);
+        }
+        var v = getViolatingChildren(node);
+        this.relatedNodes(v);
+        return !v.length;
+      },
+      after: function after(results, options) {
+        return [ results[0] ];
+      }
+    }, {
+      id: 'skip-link',
+      evaluate: function evaluate(node, options) {
+        return axe.commons.dom.isFocusable(axe.commons.dom.getElementByReference(node, 'href'));
+      },
+      after: function after(results, options) {
+        return [ results[0] ];
+      }
+    }, {
+      id: 'unique-frame-title',
+      evaluate: function evaluate(node, options) {
+        var title = axe.commons.text.sanitize(node.title).trim().toLowerCase();
+        this.data(title);
+        return true;
+      },
+      after: function after(results, options) {
+        var titles = {};
+        results.forEach(function(r) {
+          titles[r.data] = titles[r.data] !== undefined ? ++titles[r.data] : 0;
+        });
+        results.forEach(function(r) {
+          r.result = !!titles[r.data];
+        });
+        return results;
+      }
+    }, {
+      id: 'aria-label',
+      evaluate: function evaluate(node, options) {
+        var label = node.getAttribute('aria-label');
+        return !!(label ? axe.commons.text.sanitize(label).trim() : '');
+      }
+    }, {
+      id: 'aria-labelledby',
+      evaluate: function evaluate(node, options) {
+        var getIdRefs = axe.commons.dom.idrefs;
+        return getIdRefs(node, 'aria-labelledby').some(function(elm) {
+          return elm && axe.commons.text.accessibleText(elm, true);
+        });
+      }
+    }, {
+      id: 'button-has-visible-text',
+      evaluate: function evaluate(node, options) {
+        var nodeName = node.nodeName.toUpperCase();
+        var role = node.getAttribute('role');
+        var label = void 0;
+        if (nodeName === 'BUTTON' || role === 'button' && nodeName !== 'INPUT') {
+          label = axe.commons.text.accessibleText(node);
+          this.data(label);
+          return !!label;
+        } else {
+          return false;
+        }
+      }
+    }, {
+      id: 'doc-has-title',
+      evaluate: function evaluate(node, options) {
+        var title = document.title;
+        return !!(title ? axe.commons.text.sanitize(title).trim() : '');
+      }
+    }, {
+      id: 'duplicate-id',
+      evaluate: function evaluate(node, options) {
+        if (!node.id.trim()) {
+          return true;
+        }
+        var matchingNodes = document.querySelectorAll('[id="' + axe.commons.utils.escapeSelector(node.id) + '"]');
+        var related = [];
+        for (var i = 0; i < matchingNodes.length; i++) {
+          if (matchingNodes[i] !== node) {
+            related.push(matchingNodes[i]);
+          }
+        }
+        if (related.length) {
+          this.relatedNodes(related);
+        }
+        this.data(node.getAttribute('id'));
+        return matchingNodes.length <= 1;
+      },
+      after: function after(results, options) {
+        var uniqueIds = [];
+        return results.filter(function(r) {
+          if (uniqueIds.indexOf(r.data) === -1) {
+            uniqueIds.push(r.data);
+            return true;
+          }
+          return false;
+        });
+      }
+    }, {
+      id: 'exists',
+      evaluate: function evaluate(node, options) {
+        return true;
+      }
+    }, {
+      id: 'has-alt',
+      evaluate: function evaluate(node, options) {
+        var nn = node.nodeName.toLowerCase();
+        return node.hasAttribute('alt') && (nn === 'img' || nn === 'input' || nn === 'area');
+      }
+    }, {
+      id: 'has-visible-text',
+      evaluate: function evaluate(node, options) {
+        return axe.commons.text.accessibleText(node).length > 0;
+      }
+    }, {
+      id: 'is-on-screen',
+      evaluate: function evaluate(node, options) {
+        return axe.commons.dom.isVisible(node, false) && !axe.commons.dom.isOffscreen(node);
+      }
+    }, {
+      id: 'non-empty-alt',
+      evaluate: function evaluate(node, options) {
+        var label = node.getAttribute('alt');
+        return !!(label ? axe.commons.text.sanitize(label).trim() : '');
+      }
+    }, {
+      id: 'non-empty-if-present',
+      evaluate: function evaluate(node, options) {
+        var nodeName = node.nodeName.toUpperCase();
+        var type = (node.getAttribute('type') || '').toLowerCase();
+        var label = node.getAttribute('value');
+        this.data(label);
+        if (nodeName === 'INPUT' && [ 'submit', 'reset' ].indexOf(type) !== -1) {
+          return label === null;
+        }
+        return false;
+      }
+    }, {
+      id: 'non-empty-title',
+      evaluate: function evaluate(node, options) {
+        var title = node.getAttribute('title');
+        return !!(title ? axe.commons.text.sanitize(title).trim() : '');
+      }
+    }, {
+      id: 'non-empty-value',
+      evaluate: function evaluate(node, options) {
+        var label = node.getAttribute('value');
+        return !!(label ? axe.commons.text.sanitize(label).trim() : '');
+      }
+    }, {
+      id: 'role-none',
+      evaluate: function evaluate(node, options) {
+        return node.getAttribute('role') === 'none';
+      }
+    }, {
+      id: 'role-presentation',
+      evaluate: function evaluate(node, options) {
+        return node.getAttribute('role') === 'presentation';
+      }
+    }, {
+      id: 'caption-faked',
+      evaluate: function evaluate(node, options) {
+        var table = axe.commons.table.toGrid(node);
+        var firstRow = table[0];
+        if (table.length <= 1 || firstRow.length <= 1 || node.rows.length <= 1) {
+          return true;
+        }
+        return firstRow.reduce(function(out, curr, i) {
+          return out || curr !== firstRow[i + 1] && firstRow[i + 1] !== undefined;
+        }, false);
+      }
+    }, {
+      id: 'has-caption',
+      evaluate: function evaluate(node, options) {
+        return !!node.caption;
+      }
+    }, {
+      id: 'has-summary',
+      evaluate: function evaluate(node, options) {
+        return !!node.summary;
+      }
+    }, {
+      id: 'has-th',
+      evaluate: function evaluate(node, options) {
+        var row, cell, badCells = [];
+        for (var rowIndex = 0, rowLength = node.rows.length; rowIndex < rowLength; rowIndex++) {
+          row = node.rows[rowIndex];
+          for (var cellIndex = 0, cellLength = row.cells.length; cellIndex < cellLength; cellIndex++) {
+            cell = row.cells[cellIndex];
+            if (cell.nodeName.toUpperCase() === 'TH' || [ 'rowheader', 'columnheader' ].indexOf(cell.getAttribute('role')) !== -1) {
+              badCells.push(cell);
+            }
+          }
+        }
+        if (badCells.length) {
+          this.relatedNodes(badCells);
+          return true;
+        }
+        return false;
+      }
+    }, {
+      id: 'html5-scope',
+      evaluate: function evaluate(node, options) {
+        if (!axe.commons.dom.isHTML5(document)) {
+          return true;
+        }
+        return node.nodeName.toUpperCase() === 'TH';
+      }
+    }, {
+      id: 'same-caption-summary',
+      evaluate: function evaluate(node, options) {
+        return !!(node.summary && node.caption) && node.summary === axe.commons.text.accessibleText(node.caption);
+      }
+    }, {
+      id: 'scope-value',
+      evaluate: function evaluate(node, options) {
+        options = options || {};
+        var value = node.getAttribute('scope').toLowerCase();
+        var validVals = [ 'row', 'col', 'rowgroup', 'colgroup' ] || options.values;
+        return validVals.indexOf(value) !== -1;
+      }
+    }, {
+      id: 'td-has-header',
+      evaluate: function evaluate(node, options) {
+        var tableUtils = axe.commons.table;
+        var badCells = [];
+        var cells = tableUtils.getAllCells(node);
+        cells.forEach(function(cell) {
+          if (axe.commons.dom.hasContent(cell) && tableUtils.isDataCell(cell) && !axe.commons.aria.label(cell)) {
+            var hasHeaders = tableUtils.getHeaders(cell);
+            hasHeaders = hasHeaders.reduce(function(hasHeaders, header) {
+              return hasHeaders || header !== null && !!axe.commons.dom.hasContent(header);
+            }, false);
+            if (!hasHeaders) {
+              badCells.push(cell);
+            }
+          }
+        });
+        if (badCells.length) {
+          this.relatedNodes(badCells);
+          return false;
+        }
+        return true;
+      }
+    }, {
+      id: 'td-headers-attr',
+      evaluate: function evaluate(node, options) {
+        var cells = [];
+        for (var rowIndex = 0, rowLength = node.rows.length; rowIndex < rowLength; rowIndex++) {
+          var row = node.rows[rowIndex];
+          for (var cellIndex = 0, cellLength = row.cells.length; cellIndex < cellLength; cellIndex++) {
+            cells.push(row.cells[cellIndex]);
+          }
+        }
+        var ids = cells.reduce(function(ids, cell) {
+          if (cell.id) {
+            ids.push(cell.id);
+          }
+          return ids;
+        }, []);
+        var badCells = cells.reduce(function(badCells, cell) {
+          var isSelf, notOfTable;
+          var headers = (cell.getAttribute('headers') || '').split(/\s/).reduce(function(headers, header) {
+            header = header.trim();
+            if (header) {
+              headers.push(header);
+            }
+            return headers;
+          }, []);
+          if (headers.length !== 0) {
+            if (cell.id) {
+              isSelf = headers.indexOf(cell.id.trim()) !== -1;
+            }
+            notOfTable = headers.reduce(function(fail, header) {
+              return fail || ids.indexOf(header) === -1;
+            }, false);
+            if (isSelf || notOfTable) {
+              badCells.push(cell);
+            }
+          }
+          return badCells;
+        }, []);
+        if (badCells.length > 0) {
+          this.relatedNodes(badCells);
+          return false;
+        } else {
+          return true;
+        }
+      }
+    }, {
+      id: 'th-has-data-cells',
+      evaluate: function evaluate(node, options) {
+        var tableUtils = axe.commons.table;
+        var cells = tableUtils.getAllCells(node);
+        var checkResult = this;
+        var reffedHeaders = [];
+        cells.forEach(function(cell) {
+          var headers = cell.getAttribute('headers');
+          if (headers) {
+            reffedHeaders = reffedHeaders.concat(headers.split(/\s+/));
+          }
+          var ariaLabel = cell.getAttribute('aria-labelledby');
+          if (ariaLabel) {
+            reffedHeaders = reffedHeaders.concat(ariaLabel.split(/\s+/));
+          }
+        });
+        var headers = cells.filter(function(cell) {
+          if (axe.commons.text.sanitize(cell.textContent) === '') {
+            return false;
+          }
+          return cell.nodeName.toUpperCase() === 'TH' || [ 'rowheader', 'columnheader' ].indexOf(cell.getAttribute('role')) !== -1;
+        });
+        var tableGrid = tableUtils.toGrid(node);
+        var out = headers.reduce(function(res, header) {
+          if (header.id && reffedHeaders.indexOf(header.id) !== -1) {
+            return !res ? res : true;
+          }
+          var hasCell = false;
+          var pos = tableUtils.getCellPosition(header, tableGrid);
+          if (tableUtils.isColumnHeader(header)) {
+            hasCell = tableUtils.traverse('down', pos, tableGrid).reduce(function(out, cell) {
+              return out || axe.commons.dom.hasContent(cell) && !tableUtils.isColumnHeader(cell);
+            }, false);
+          }
+          if (!hasCell && tableUtils.isRowHeader(header)) {
+            hasCell = tableUtils.traverse('right', pos, tableGrid).reduce(function(out, cell) {
+              return out || axe.commons.dom.hasContent(cell) && !tableUtils.isRowHeader(cell);
+            }, false);
+          }
+          if (!hasCell) {
+            checkResult.relatedNodes(header);
+          }
+          return res && hasCell;
+        }, true);
+        return out ? true : undefined;
+      }
+    }, {
+      id: 'hidden-content',
+      evaluate: function evaluate(node, options) {
+        var styles = window.getComputedStyle(node);
+        var whitelist = [ 'SCRIPT', 'HEAD', 'TITLE', 'NOSCRIPT', 'STYLE', 'TEMPLATE' ];
+        if (!whitelist.includes(node.tagName.toUpperCase()) && axe.commons.dom.hasContent(node)) {
+          if (styles.getPropertyValue('display') === 'none') {
+            return undefined;
+          } else if (styles.getPropertyValue('visibility') === 'hidden') {
+            if (node.parentNode) {
+              var parentStyle = window.getComputedStyle(node.parentNode);
+            }
+            if (!parentStyle || parentStyle.getPropertyValue('visibility') !== 'hidden') {
+              return undefined;
+            }
+          }
+        }
+        return true;
+      }
+    } ],
+    commons: function() {
+      var commons = {};
+      var aria = commons.aria = {}, lookupTables = aria._lut = {};
+      lookupTables.attributes = {
+        'aria-activedescendant': {
+          type: 'idref'
+        },
+        'aria-atomic': {
+          type: 'boolean',
+          values: [ 'true', 'false' ]
+        },
+        'aria-autocomplete': {
+          type: 'nmtoken',
+          values: [ 'inline', 'list', 'both', 'none' ]
+        },
+        'aria-busy': {
+          type: 'boolean',
+          values: [ 'true', 'false' ]
+        },
+        'aria-checked': {
+          type: 'nmtoken',
+          values: [ 'true', 'false', 'mixed', 'undefined' ]
+        },
+        'aria-colcount': {
+          type: 'int'
+        },
+        'aria-colindex': {
+          type: 'int'
+        },
+        'aria-colspan': {
+          type: 'int'
+        },
+        'aria-controls': {
+          type: 'idrefs'
+        },
+        'aria-current': {
+          type: 'nmtoken',
+          values: [ 'page', 'step', 'location', 'date', 'time', 'true', 'false' ]
+        },
+        'aria-describedby': {
+          type: 'idrefs'
+        },
+        'aria-disabled': {
+          type: 'boolean',
+          values: [ 'true', 'false' ]
+        },
+        'aria-dropeffect': {
+          type: 'nmtokens',
+          values: [ 'copy', 'move', 'reference', 'execute', 'popup', 'none' ]
+        },
+        'aria-expanded': {
+          type: 'nmtoken',
+          values: [ 'true', 'false', 'undefined' ]
+        },
+        'aria-flowto': {
+          type: 'idrefs'
+        },
+        'aria-grabbed': {
+          type: 'nmtoken',
+          values: [ 'true', 'false', 'undefined' ]
+        },
+        'aria-haspopup': {
+          type: 'boolean',
+          values: [ 'true', 'false' ]
+        },
+        'aria-hidden': {
+          type: 'boolean',
+          values: [ 'true', 'false' ]
+        },
+        'aria-invalid': {
+          type: 'nmtoken',
+          values: [ 'true', 'false', 'spelling', 'grammar' ]
+        },
+        'aria-label': {
+          type: 'string'
+        },
+        'aria-labelledby': {
+          type: 'idrefs'
+        },
+        'aria-level': {
+          type: 'int'
+        },
+        'aria-live': {
+          type: 'nmtoken',
+          values: [ 'off', 'polite', 'assertive' ]
+        },
+        'aria-multiline': {
+          type: 'boolean',
+          values: [ 'true', 'false' ]
+        },
+        'aria-multiselectable': {
+          type: 'boolean',
+          values: [ 'true', 'false' ]
+        },
+        'aria-orientation': {
+          type: 'nmtoken',
+          values: [ 'horizontal', 'vertical' ]
+        },
+        'aria-owns': {
+          type: 'idrefs'
+        },
+        'aria-posinset': {
+          type: 'int'
+        },
+        'aria-pressed': {
+          type: 'nmtoken',
+          values: [ 'true', 'false', 'mixed', 'undefined' ]
+        },
+        'aria-readonly': {
+          type: 'boolean',
+          values: [ 'true', 'false' ]
+        },
+        'aria-relevant': {
+          type: 'nmtokens',
+          values: [ 'additions', 'removals', 'text', 'all' ]
+        },
+        'aria-required': {
+          type: 'boolean',
+          values: [ 'true', 'false' ]
+        },
+        'aria-rowcount': {
+          type: 'int'
+        },
+        'aria-rowindex': {
+          type: 'int'
+        },
+        'aria-rowspan': {
+          type: 'int'
+        },
+        'aria-selected': {
+          type: 'nmtoken',
+          values: [ 'true', 'false', 'undefined' ]
+        },
+        'aria-setsize': {
+          type: 'int'
+        },
+        'aria-sort': {
+          type: 'nmtoken',
+          values: [ 'ascending', 'descending', 'other', 'none' ]
+        },
+        'aria-valuemax': {
+          type: 'decimal'
+        },
+        'aria-valuemin': {
+          type: 'decimal'
+        },
+        'aria-valuenow': {
+          type: 'decimal'
+        },
+        'aria-valuetext': {
+          type: 'string'
+        }
+      };
+      lookupTables.globalAttributes = [ 'aria-atomic', 'aria-busy', 'aria-controls', 'aria-current', 'aria-describedby', 'aria-disabled', 'aria-dropeffect', 'aria-flowto', 'aria-grabbed', 'aria-haspopup', 'aria-hidden', 'aria-invalid', 'aria-label', 'aria-labelledby', 'aria-live', 'aria-owns', 'aria-relevant' ];
+      lookupTables.role = {
+        alert: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        alertdialog: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        application: {
+          type: 'landmark',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        article: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'article' ]
+        },
+        banner: {
+          type: 'landmark',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'header' ]
+        },
+        button: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded', 'aria-pressed' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: null,
+          implicit: [ 'button', 'input[type="button"]', 'input[type="image"]', 'input[type="reset"]', 'input[type="submit"]', 'summary' ]
+        },
+        cell: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-colindex', 'aria-colspan', 'aria-rowindex', 'aria-rowspan' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'row' ],
+          implicit: [ 'td', 'th' ]
+        },
+        checkbox: {
+          type: 'widget',
+          attributes: {
+            required: [ 'aria-checked' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: null,
+          implicit: [ 'input[type="checkbox"]' ]
+        },
+        columnheader: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded', 'aria-sort', 'aria-readonly', 'aria-selected', 'aria-required' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'row' ],
+          implicit: [ 'th' ]
+        },
+        combobox: {
+          type: 'composite',
+          attributes: {
+            required: [ 'aria-expanded' ],
+            allowed: [ 'aria-autocomplete', 'aria-required', 'aria-activedescendant' ]
+          },
+          owned: {
+            all: [ 'listbox', 'textbox' ]
+          },
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        command: {
+          nameFrom: [ 'author' ],
+          type: 'abstract'
+        },
+        complementary: {
+          type: 'landmark',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'aside' ]
+        },
+        composite: {
+          nameFrom: [ 'author' ],
+          type: 'abstract'
+        },
+        contentinfo: {
+          type: 'landmark',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'footer' ]
+        },
+        definition: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'dd' ]
+        },
+        dialog: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'dialog' ]
+        },
+        directory: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: null
+        },
+        document: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'body' ]
+        },
+        form: {
+          type: 'landmark',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'form' ]
+        },
+        grid: {
+          type: 'composite',
+          attributes: {
+            allowed: [ 'aria-level', 'aria-multiselectable', 'aria-readonly', 'aria-activedescendant', 'aria-expanded' ]
+          },
+          owned: {
+            one: [ 'rowgroup', 'row' ]
+          },
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'table' ]
+        },
+        gridcell: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-selected', 'aria-readonly', 'aria-expanded', 'aria-required' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'row' ],
+          implicit: [ 'td', 'th' ]
+        },
+        group: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'details', 'optgroup' ]
+        },
+        heading: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-level', 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: null,
+          implicit: [ 'h1', 'h2', 'h3', 'h4', 'h5', 'h6' ]
+        },
+        img: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'img' ]
+        },
+        input: {
+          nameFrom: [ 'author' ],
+          type: 'abstract'
+        },
+        landmark: {
+          nameFrom: [ 'author' ],
+          type: 'abstract'
+        },
+        link: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: null,
+          implicit: [ 'a[href]' ]
+        },
+        list: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: {
+            all: [ 'listitem' ]
+          },
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'ol', 'ul', 'dl' ]
+        },
+        listbox: {
+          type: 'composite',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-multiselectable', 'aria-required', 'aria-expanded' ]
+          },
+          owned: {
+            all: [ 'option' ]
+          },
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'select' ]
+        },
+        listitem: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-level', 'aria-posinset', 'aria-setsize', 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'list' ],
+          implicit: [ 'li', 'dt' ]
+        },
+        log: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        main: {
+          type: 'landmark',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'main' ]
+        },
+        marquee: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        math: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'math' ]
+        },
+        menu: {
+          type: 'composite',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-expanded' ]
+          },
+          owned: {
+            one: [ 'menuitem', 'menuitemradio', 'menuitemcheckbox' ]
+          },
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'menu[type="context"]' ]
+        },
+        menubar: {
+          type: 'composite',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        menuitem: {
+          type: 'widget',
+          attributes: null,
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'menu', 'menubar' ],
+          implicit: [ 'menuitem[type="command"]' ]
+        },
+        menuitemcheckbox: {
+          type: 'widget',
+          attributes: {
+            required: [ 'aria-checked' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'menu', 'menubar' ],
+          implicit: [ 'menuitem[type="checkbox"]' ]
+        },
+        menuitemradio: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-selected', 'aria-posinset', 'aria-setsize' ],
+            required: [ 'aria-checked' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'menu', 'menubar' ],
+          implicit: [ 'menuitem[type="radio"]' ]
+        },
+        navigation: {
+          type: 'landmark',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'nav' ]
+        },
+        none: {
+          type: 'structure',
+          attributes: null,
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        note: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        option: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-selected', 'aria-posinset', 'aria-setsize', 'aria-checked' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'listbox' ],
+          implicit: [ 'option' ]
+        },
+        presentation: {
+          type: 'structure',
+          attributes: null,
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        progressbar: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-valuetext', 'aria-valuenow', 'aria-valuemax', 'aria-valuemin' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'progress' ]
+        },
+        radio: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-selected', 'aria-posinset', 'aria-setsize' ],
+            required: [ 'aria-checked' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: null,
+          implicit: [ 'input[type="radio"]' ]
+        },
+        radiogroup: {
+          type: 'composite',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-required', 'aria-expanded' ]
+          },
+          owned: {
+            all: [ 'radio' ]
+          },
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        range: {
+          nameFrom: [ 'author' ],
+          type: 'abstract'
+        },
+        region: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'section' ]
+        },
+        roletype: {
+          type: 'abstract'
+        },
+        row: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-level', 'aria-selected', 'aria-activedescendant', 'aria-expanded' ]
+          },
+          owned: {
+            one: [ 'cell', 'columnheader', 'rowheader', 'gridcell' ]
+          },
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'rowgroup', 'grid', 'treegrid', 'table' ],
+          implicit: [ 'tr' ]
+        },
+        rowgroup: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-expanded' ]
+          },
+          owned: {
+            all: [ 'row' ]
+          },
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'grid', 'table' ],
+          implicit: [ 'tbody', 'thead', 'tfoot' ]
+        },
+        rowheader: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-sort', 'aria-required', 'aria-readonly', 'aria-expanded', 'aria-selected' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'row' ],
+          implicit: [ 'th' ]
+        },
+        scrollbar: {
+          type: 'widget',
+          attributes: {
+            required: [ 'aria-controls', 'aria-orientation', 'aria-valuenow', 'aria-valuemax', 'aria-valuemin' ],
+            allowed: [ 'aria-valuetext' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        search: {
+          type: 'landmark',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        searchbox: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-autocomplete', 'aria-multiline', 'aria-readonly', 'aria-required' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'input[type="search"]' ]
+        },
+        section: {
+          nameFrom: [ 'author', 'contents' ],
+          type: 'abstract'
+        },
+        sectionhead: {
+          nameFrom: [ 'author', 'contents' ],
+          type: 'abstract'
+        },
+        select: {
+          nameFrom: [ 'author' ],
+          type: 'abstract'
+        },
+        separator: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-expanded', 'aria-orientation' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'hr' ]
+        },
+        slider: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-valuetext', 'aria-orientation' ],
+            required: [ 'aria-valuenow', 'aria-valuemax', 'aria-valuemin' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'input[type="range"]' ]
+        },
+        spinbutton: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-valuetext', 'aria-required' ],
+            required: [ 'aria-valuenow', 'aria-valuemax', 'aria-valuemin' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'input[type="number"]' ]
+        },
+        status: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'output' ]
+        },
+        structure: {
+          type: 'abstract'
+        },
+        switch: {
+          type: 'widget',
+          attributes: {
+            required: [ 'aria-checked' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: null
+        },
+        tab: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-selected', 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'tablist' ]
+        },
+        table: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-colcount', 'aria-rowcount' ]
+          },
+          owned: {
+            one: [ 'rowgroup', 'row' ]
+          },
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'table' ]
+        },
+        tablist: {
+          type: 'composite',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-expanded', 'aria-level', 'aria-multiselectable' ]
+          },
+          owned: {
+            all: [ 'tab' ]
+          },
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        tabpanel: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        text: {
+          type: 'structure',
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: null
+        },
+        textbox: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-autocomplete', 'aria-multiline', 'aria-readonly', 'aria-required' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'input[type="text"]', 'input[type="email"]', 'input[type="password"]', 'input[type="tel"]', 'input[type="url"]', 'input:not([type])', 'textarea' ]
+        },
+        timer: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        toolbar: {
+          type: 'structure',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author' ],
+          context: null,
+          implicit: [ 'menu[type="toolbar"]' ]
+        },
+        tooltip: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-expanded' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: null
+        },
+        tree: {
+          type: 'composite',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-multiselectable', 'aria-required', 'aria-expanded' ]
+          },
+          owned: {
+            all: [ 'treeitem' ]
+          },
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        treegrid: {
+          type: 'composite',
+          attributes: {
+            allowed: [ 'aria-activedescendant', 'aria-expanded', 'aria-level', 'aria-multiselectable', 'aria-readonly', 'aria-required' ]
+          },
+          owned: {
+            all: [ 'treeitem' ]
+          },
+          nameFrom: [ 'author' ],
+          context: null
+        },
+        treeitem: {
+          type: 'widget',
+          attributes: {
+            allowed: [ 'aria-checked', 'aria-selected', 'aria-expanded', 'aria-level', 'aria-posinset', 'aria-setsize' ]
+          },
+          owned: null,
+          nameFrom: [ 'author', 'contents' ],
+          context: [ 'treegrid', 'tree' ]
+        },
+        widget: {
+          type: 'abstract'
+        },
+        window: {
+          nameFrom: [ 'author' ],
+          type: 'abstract'
+        }
+      };
+      var color = {};
+      commons.color = color;
+      var dom = commons.dom = {};
+      var table = commons.table = {};
+      var text = commons.text = {};
+      var utils = commons.utils = axe.utils;
+      aria.requiredAttr = function(role) {
+        'use strict';
+        var roles = lookupTables.role[role], attr = roles && roles.attributes && roles.attributes.required;
+        return attr || [];
+      };
+      aria.allowedAttr = function(role) {
+        'use strict';
+        var roles = lookupTables.role[role], attr = roles && roles.attributes && roles.attributes.allowed || [], requiredAttr = roles && roles.attributes && roles.attributes.required || [];
+        return attr.concat(lookupTables.globalAttributes).concat(requiredAttr);
+      };
+      aria.validateAttr = function(att) {
+        'use strict';
+        return !!lookupTables.attributes[att];
+      };
+      aria.validateAttrValue = function(node, attr) {
+        'use strict';
+        var matches, list, value = node.getAttribute(attr), attrInfo = lookupTables.attributes[attr];
+        var doc = dom.getRootNode(node);
+        if (!attrInfo) {
+          return true;
+        }
+        switch (attrInfo.type) {
+         case 'boolean':
+         case 'nmtoken':
+          return typeof value === 'string' && attrInfo.values.indexOf(value.toLowerCase()) !== -1;
+
+         case 'nmtokens':
+          list = axe.utils.tokenList(value);
+          return list.reduce(function(result, token) {
+            return result && attrInfo.values.indexOf(token) !== -1;
+          }, list.length !== 0);
+
+         case 'idref':
+          return !!(value && doc.getElementById(value));
+
+         case 'idrefs':
+          list = axe.utils.tokenList(value);
+          return list.reduce(function(result, token) {
+            return !!(result && doc.getElementById(token));
+          }, list.length !== 0);
+
+         case 'string':
+          return true;
+
+         case 'decimal':
+          matches = value.match(/^[-+]?([0-9]*)\.?([0-9]*)$/);
+          return !!(matches && (matches[1] || matches[2]));
+
+         case 'int':
+          return /^[-+]?[0-9]+$/.test(value);
+        }
+      };
+      aria.label = function(node) {
+        var ref, candidate;
+        if (node.actualNode.getAttribute('aria-labelledby')) {
+          ref = dom.idrefs(node.actualNode, 'aria-labelledby');
+          candidate = ref.map(function(thing) {
+            var vNode = axe.utils.getNodeFromTree(axe._tree[0], thing);
+            return vNode ? text.visible(vNode, true) : '';
+          }).join(' ').trim();
+          if (candidate) {
+            return candidate;
+          }
+        }
+        candidate = node.actualNode.getAttribute('aria-label');
+        if (candidate) {
+          candidate = text.sanitize(candidate).trim();
+          if (candidate) {
+            return candidate;
+          }
+        }
+        return null;
+      };
+      aria.isValidRole = function(role) {
+        'use strict';
+        if (lookupTables.role[role]) {
+          return true;
+        }
+        return false;
+      };
+      aria.getRolesWithNameFromContents = function() {
+        return Object.keys(lookupTables.role).filter(function(r) {
+          return lookupTables.role[r].nameFrom && lookupTables.role[r].nameFrom.indexOf('contents') !== -1;
+        });
+      };
+      aria.getRolesByType = function(roleType) {
+        return Object.keys(lookupTables.role).filter(function(r) {
+          return lookupTables.role[r].type === roleType;
+        });
+      };
+      aria.getRoleType = function(role) {
+        var r = lookupTables.role[role];
+        return r && r.type || null;
+      };
+      aria.requiredOwned = function(role) {
+        'use strict';
+        var owned = null, roles = lookupTables.role[role];
+        if (roles) {
+          owned = axe.utils.clone(roles.owned);
+        }
+        return owned;
+      };
+      aria.requiredContext = function(role) {
+        'use strict';
+        var context = null, roles = lookupTables.role[role];
+        if (roles) {
+          context = axe.utils.clone(roles.context);
+        }
+        return context;
+      };
+      aria.implicitNodes = function(role) {
+        'use strict';
+        var implicit = null, roles = lookupTables.role[role];
+        if (roles && roles.implicit) {
+          implicit = axe.utils.clone(roles.implicit);
+        }
+        return implicit;
+      };
+      aria.implicitRole = function(node) {
+        'use strict';
+        var isValidImplicitRole = function isValidImplicitRole(set, role) {
+          var validForNodeType = function validForNodeType(implicitNodeTypeSelector) {
+            return axe.utils.matchesSelector(node, implicitNodeTypeSelector);
+          };
+          if (role.implicit && role.implicit.some(validForNodeType)) {
+            set.push(role.name);
+          }
+          return set;
+        };
+        var sortRolesByOptimalAriaContext = function sortRolesByOptimalAriaContext(roles, ariaAttributes) {
+          var getScore = function getScore(role) {
+            var allowedAriaAttributes = aria.allowedAttr(role);
+            return allowedAriaAttributes.reduce(function(score, attribute) {
+              return score + (ariaAttributes.indexOf(attribute) > -1 ? 1 : 0);
+            }, 0);
+          };
+          var scored = roles.map(function(role) {
+            return {
+              score: getScore(role),
+              name: role
+            };
+          });
+          var sorted = scored.sort(function(scoredRoleA, scoredRoleB) {
+            return scoredRoleB.score - scoredRoleA.score;
+          });
+          return sorted.map(function(sortedRole) {
+            return sortedRole.name;
+          });
+        };
+        var roles = Object.keys(lookupTables.role).map(function(role) {
+          var lookup = lookupTables.role[role];
+          return {
+            name: role,
+            implicit: lookup && lookup.implicit
+          };
+        });
+        var availableImplicitRoles = roles.reduce(isValidImplicitRole, []);
+        if (!availableImplicitRoles.length) {
+          return null;
+        }
+        var nodeAttributes = node.attributes;
+        var ariaAttributes = [];
+        for (var i = 0, j = nodeAttributes.length; i < j; i++) {
+          var attr = nodeAttributes[i];
+          if (attr.name.match(/^aria-/)) {
+            ariaAttributes.push(attr.name);
+          }
+        }
+        return sortRolesByOptimalAriaContext(availableImplicitRoles, ariaAttributes).shift();
+      };
+      color.Color = function(red, green, blue, alpha) {
+        this.red = red;
+        this.green = green;
+        this.blue = blue;
+        this.alpha = alpha;
+        this.toHexString = function() {
+          var redString = Math.round(this.red).toString(16);
+          var greenString = Math.round(this.green).toString(16);
+          var blueString = Math.round(this.blue).toString(16);
+          return '#' + (this.red > 15.5 ? redString : '0' + redString) + (this.green > 15.5 ? greenString : '0' + greenString) + (this.blue > 15.5 ? blueString : '0' + blueString);
+        };
+        var rgbRegex = /^rgb\((\d+), (\d+), (\d+)\)$/;
+        var rgbaRegex = /^rgba\((\d+), (\d+), (\d+), (\d*(\.\d+)?)\)/;
+        this.parseRgbString = function(colorString) {
+          if (colorString === 'transparent') {
+            this.red = 0;
+            this.green = 0;
+            this.blue = 0;
+            this.alpha = 0;
+            return;
+          }
+          var match = colorString.match(rgbRegex);
+          if (match) {
+            this.red = parseInt(match[1], 10);
+            this.green = parseInt(match[2], 10);
+            this.blue = parseInt(match[3], 10);
+            this.alpha = 1;
+            return;
+          }
+          match = colorString.match(rgbaRegex);
+          if (match) {
+            this.red = parseInt(match[1], 10);
+            this.green = parseInt(match[2], 10);
+            this.blue = parseInt(match[3], 10);
+            this.alpha = parseFloat(match[4]);
+            return;
+          }
+        };
+        this.getRelativeLuminance = function() {
+          var rSRGB = this.red / 255;
+          var gSRGB = this.green / 255;
+          var bSRGB = this.blue / 255;
+          var r = rSRGB <= .03928 ? rSRGB / 12.92 : Math.pow((rSRGB + .055) / 1.055, 2.4);
+          var g = gSRGB <= .03928 ? gSRGB / 12.92 : Math.pow((gSRGB + .055) / 1.055, 2.4);
+          var b = bSRGB <= .03928 ? bSRGB / 12.92 : Math.pow((bSRGB + .055) / 1.055, 2.4);
+          return .2126 * r + .7152 * g + .0722 * b;
+        };
+      };
+      color.flattenColors = function(fgColor, bgColor) {
+        var alpha = fgColor.alpha;
+        var r = (1 - alpha) * bgColor.red + alpha * fgColor.red;
+        var g = (1 - alpha) * bgColor.green + alpha * fgColor.green;
+        var b = (1 - alpha) * bgColor.blue + alpha * fgColor.blue;
+        var a = fgColor.alpha + bgColor.alpha * (1 - fgColor.alpha);
+        return new color.Color(r, g, b, a);
+      };
+      color.getContrast = function(bgColor, fgColor) {
+        if (!fgColor || !bgColor) {
+          return null;
+        }
+        if (fgColor.alpha < 1) {
+          fgColor = color.flattenColors(fgColor, bgColor);
+        }
+        var bL = bgColor.getRelativeLuminance();
+        var fL = fgColor.getRelativeLuminance();
+        return (Math.max(fL, bL) + .05) / (Math.min(fL, bL) + .05);
+      };
+      color.hasValidContrastRatio = function(bg, fg, fontSize, isBold) {
+        var contrast = color.getContrast(bg, fg);
+        var isSmallFont = isBold && Math.ceil(fontSize * 72) / 96 < 14 || !isBold && Math.ceil(fontSize * 72) / 96 < 18;
+        return {
+          isValid: isSmallFont && contrast >= 4.5 || !isSmallFont && contrast >= 3,
+          contrastRatio: contrast
+        };
+      };
+      function _getFonts(style) {
+        return style.getPropertyValue('font-family').split(/[,;]/g).map(function(font) {
+          return font.trim().toLowerCase();
+        });
+      }
+      function elementIsDistinct(node, ancestorNode) {
+        var nodeStyle = window.getComputedStyle(node);
+        if (nodeStyle.getPropertyValue('background-image') !== 'none') {
+          return true;
+        }
+        var hasBorder = [ 'border-bottom', 'border-top', 'outline' ].reduce(function(result, edge) {
+          var borderClr = new color.Color();
+          borderClr.parseRgbString(nodeStyle.getPropertyValue(edge + '-color'));
+          return result || nodeStyle.getPropertyValue(edge + '-style') !== 'none' && parseFloat(nodeStyle.getPropertyValue(edge + '-width')) > 0 && borderClr.alpha !== 0;
+        }, false);
+        if (hasBorder) {
+          return true;
+        }
+        var parentStyle = window.getComputedStyle(ancestorNode);
+        if (_getFonts(nodeStyle)[0] !== _getFonts(parentStyle)[0]) {
+          return true;
+        }
+        var hasStyle = [ 'text-decoration-line', 'text-decoration-style', 'font-weight', 'font-style', 'font-size' ].reduce(function(result, cssProp) {
+          return result || nodeStyle.getPropertyValue(cssProp) !== parentStyle.getPropertyValue(cssProp);
+        }, false);
+        var tDec = nodeStyle.getPropertyValue('text-decoration');
+        if (tDec.split(' ').length < 3) {
+          hasStyle = hasStyle || tDec !== parentStyle.getPropertyValue('text-decoration');
+        }
+        return hasStyle;
+      }
+      color.elementIsDistinct = elementIsDistinct;
+      var graphicNodes = [ 'IMG', 'CANVAS', 'OBJECT', 'IFRAME', 'VIDEO', 'SVG' ];
+      function elmHasImage(elm, style) {
+        var nodeName = elm.nodeName.toUpperCase();
+        if (graphicNodes.includes(nodeName)) {
+          axe.commons.color.incompleteData.set('bgColor', 'imgNode');
+          return true;
+        }
+        style = style || window.getComputedStyle(elm);
+        var bgImageStyle = style.getPropertyValue('background-image');
+        var hasBgImage = bgImageStyle !== 'none';
+        if (hasBgImage) {
+          var hasGradient = /gradient/.test(bgImageStyle);
+          axe.commons.color.incompleteData.set('bgColor', hasGradient ? 'bgGradient' : 'bgImage');
+        }
+        return hasBgImage;
+      }
+      function getBgColor(elm, elmStyle) {
+        elmStyle = elmStyle || window.getComputedStyle(elm);
+        var bgColor = new color.Color();
+        bgColor.parseRgbString(elmStyle.getPropertyValue('background-color'));
+        if (bgColor.alpha !== 0) {
+          var opacity = elmStyle.getPropertyValue('opacity');
+          bgColor.alpha = bgColor.alpha * opacity;
+        }
+        return bgColor;
+      }
+      function contentOverlapping(targetElement, bgNode) {
+        var targetRect = targetElement.getClientRects()[0];
+        var obscuringElements = document.elementsFromPoint(targetRect.left, targetRect.top);
+        if (obscuringElements) {
+          for (var i = 0; i < obscuringElements.length; i++) {
+            if (obscuringElements[i] !== targetElement && obscuringElements[i] === bgNode) {
+              return true;
+            }
+          }
+        }
+        return false;
+      }
+      function calculateObscuringAlpha(elmIndex, elmStack, originalElm) {
+        var totalAlpha = 0;
+        if (elmIndex > 0) {
+          for (var i = elmIndex - 1; i >= 0; i--) {
+            var bgElm = elmStack[i];
+            var bgElmStyle = window.getComputedStyle(bgElm);
+            var bgColor = getBgColor(bgElm, bgElmStyle);
+            if (bgColor.alpha && contentOverlapping(originalElm, bgElm)) {
+              totalAlpha += bgColor.alpha;
+            } else {
+              elmStack.splice(i, 1);
+            }
+          }
+        }
+        return totalAlpha;
+      }
+      function elmPartiallyObscured(elm, bgElm, bgColor) {
+        var obscured = elm !== bgElm && !dom.visuallyContains(elm, bgElm) && bgColor.alpha !== 0;
+        if (obscured) {
+          axe.commons.color.incompleteData.set('bgColor', 'elmPartiallyObscured');
+        }
+        return obscured;
+      }
+      function includeMissingElements(elmStack, elm) {
+        var elementMap = {
+          TD: 'TR',
+          INPUT: 'LABEL'
+        };
+        var tagArray = elmStack.map(function(elm) {
+          return elm.tagName;
+        });
+        var bgNodes = elmStack;
+        for (var candidate in elementMap) {
+          if (elementMap.hasOwnProperty(candidate)) {
+            if (elm.tagName === candidate) {
+              var ancestorMatch = axe.commons.dom.findUp(elm, elementMap[candidate]);
+              if (ancestorMatch && elmStack.indexOf(ancestorMatch) === -1) {
+                var overlaps = axe.commons.dom.visuallyOverlaps(elm.getBoundingClientRect(), ancestorMatch);
+                if (overlaps) {
+                  bgNodes.splice(elmStack.indexOf(elm) + 1, 0, ancestorMatch);
+                }
+              }
+            }
+            if (elm.tagName === elementMap[candidate] && tagArray.indexOf(elm.tagName) === -1) {
+              bgNodes.splice(tagArray.indexOf(candidate) + 1, 0, elm);
+            }
+          }
+        }
+        return bgNodes;
+      }
+      function sortPageBackground(elmStack) {
+        var bodyIndex = elmStack.indexOf(document.body);
+        var bgNodes = elmStack;
+        if (bodyIndex > 1 && !elmHasImage(document.documentElement) && getBgColor(document.documentElement).alpha === 0) {
+          bgNodes.splice(bodyIndex, 1);
+          bgNodes.splice(elmStack.indexOf(document.documentElement), 1);
+          bgNodes.push(document.body);
+        }
+        return bgNodes;
+      }
+      color.getBackgroundStack = function(elm) {
+        var rect = elm.getBoundingClientRect();
+        var x = void 0, y = void 0;
+        if (rect.left > window.innerWidth) {
+          return;
+        }
+        if (rect.top > window.innerHeight) {
+          return;
+        }
+        x = Math.min(Math.ceil(rect.left + rect.width / 2), window.innerWidth - 1);
+        y = Math.min(Math.ceil(rect.top + rect.height / 2), window.innerHeight - 1);
+        var elmStack = document.elementsFromPoint(x, y);
+        elmStack = includeMissingElements(elmStack, elm);
+        elmStack = dom.reduceToElementsBelowFloating(elmStack, elm);
+        elmStack = sortPageBackground(elmStack);
+        var elmIndex = elmStack.indexOf(elm);
+        if (calculateObscuringAlpha(elmIndex, elmStack, elm) >= .99) {
+          axe.commons.color.incompleteData.set('bgColor', 'bgOverlap');
+          return null;
+        }
+        return elmIndex !== -1 ? elmStack : null;
+      };
+      color.getBackgroundColor = function(elm) {
+        var bgElms = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+        var noScroll = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+        if (noScroll !== true) {
+          elm.scrollIntoView();
+        }
+        var bgColors = [];
+        var elmStack = color.getBackgroundStack(elm);
+        (elmStack || []).some(function(bgElm) {
+          var bgElmStyle = window.getComputedStyle(bgElm);
+          var bgColor = getBgColor(bgElm, bgElmStyle);
+          if (elmPartiallyObscured(elm, bgElm, bgColor) || elmHasImage(bgElm, bgElmStyle)) {
+            bgColors = null;
+            bgElms.push(bgElm);
+            return true;
+          }
+          if (bgColor.alpha !== 0) {
+            bgElms.push(bgElm);
+            bgColors.push(bgColor);
+            return bgColor.alpha === 1;
+          } else {
+            return false;
+          }
+        });
+        if (bgColors !== null && elmStack !== null) {
+          bgColors.push(new color.Color(255, 255, 255, 1));
+          var colors = bgColors.reduce(color.flattenColors);
+          return colors;
+        }
+        return null;
+      };
+      dom.isOpaque = function(node) {
+        var style = window.getComputedStyle(node);
+        return elmHasImage(node, style) || getBgColor(node, style).alpha === 1;
+      };
+      color.getForegroundColor = function(node, noScroll) {
+        var nodeStyle = window.getComputedStyle(node);
+        var fgColor = new color.Color();
+        fgColor.parseRgbString(nodeStyle.getPropertyValue('color'));
+        var opacity = nodeStyle.getPropertyValue('opacity');
+        fgColor.alpha = fgColor.alpha * opacity;
+        if (fgColor.alpha === 1) {
+          return fgColor;
+        }
+        var bgColor = color.getBackgroundColor(node, [], noScroll);
+        if (bgColor === null) {
+          var reason = axe.commons.color.incompleteData.get('bgColor');
+          axe.commons.color.incompleteData.set('fgColor', reason);
+          return null;
+        }
+        return color.flattenColors(fgColor, bgColor);
+      };
+      color.incompleteData = function() {
+        var data = {};
+        return {
+          set: function set(key, reason) {
+            if (typeof key !== 'string') {
+              throw new Error('Incomplete data: key must be a string');
+            }
+            if (reason) {
+              data[key] = reason;
+            }
+            return data[key];
+          },
+          get: function get(key) {
+            return data[key];
+          },
+          clear: function clear() {
+            data = {};
+          }
+        };
+      }();
+      dom.reduceToElementsBelowFloating = function(elements, targetNode) {
+        var floatingPositions = [ 'fixed', 'sticky' ], finalElements = [], targetFound = false, index, currentNode, style;
+        for (index = 0; index < elements.length; ++index) {
+          currentNode = elements[index];
+          if (currentNode === targetNode) {
+            targetFound = true;
+          }
+          style = window.getComputedStyle(currentNode);
+          if (!targetFound && floatingPositions.indexOf(style.position) !== -1) {
+            finalElements = [];
+            continue;
+          }
+          finalElements.push(currentNode);
+        }
+        return finalElements;
+      };
+      dom.findUp = function(element, target) {
+        'use strict';
+        var parent, doc = axe.commons.dom.getRootNode(element), matches;
+        matches = doc.querySelectorAll(target);
+        matches = axe.utils.toArray(matches);
+        if (doc === document && !matches.length) {
+          return null;
+        }
+        parent = element.assignedSlot ? element.assignedSlot : element.parentNode;
+        if (parent.nodeType === 11) {
+          parent = parent.host;
+        }
+        while (parent && matches.indexOf(parent) === -1) {
+          parent = parent.assignedSlot ? parent.assignedSlot : parent.parentNode;
+          if (parent && parent.nodeType === 11) {
+            parent = parent.host;
+            doc = axe.commons.dom.getRootNode(parent);
+            matches = doc.querySelectorAll(target);
+            matches = axe.utils.toArray(matches);
+            if (doc === document && !matches.length) {
+              return null;
+            }
+          }
+        }
+        return parent;
+      };
+      dom.getElementByReference = function(node, attr) {
+        'use strict';
+        var candidate, fragment = node.getAttribute(attr), doc = document;
+        if (fragment && fragment.charAt(0) === '#') {
+          fragment = fragment.substring(1);
+          candidate = doc.getElementById(fragment);
+          if (candidate) {
+            return candidate;
+          }
+          candidate = doc.getElementsByName(fragment);
+          if (candidate.length) {
+            return candidate[0];
+          }
+        }
+        return null;
+      };
+      dom.getElementCoordinates = function(element) {
+        'use strict';
+        var scrollOffset = dom.getScrollOffset(document), xOffset = scrollOffset.left, yOffset = scrollOffset.top, coords = element.getBoundingClientRect();
+        return {
+          top: coords.top + yOffset,
+          right: coords.right + xOffset,
+          bottom: coords.bottom + yOffset,
+          left: coords.left + xOffset,
+          width: coords.right - coords.left,
+          height: coords.bottom - coords.top
+        };
+      };
+      dom.getRootNode = function(node) {
+        var doc = node.getRootNode && node.getRootNode() || document;
+        if (doc === node) {
+          doc = document;
+        }
+        return doc;
+      };
+      dom.getScrollOffset = function(element) {
+        'use strict';
+        if (!element.nodeType && element.document) {
+          element = element.document;
+        }
+        if (element.nodeType === 9) {
+          var docElement = element.documentElement, body = element.body;
+          return {
+            left: docElement && docElement.scrollLeft || body && body.scrollLeft || 0,
+            top: docElement && docElement.scrollTop || body && body.scrollTop || 0
+          };
+        }
+        return {
+          left: element.scrollLeft,
+          top: element.scrollTop
+        };
+      };
+      dom.getViewportSize = function(win) {
+        'use strict';
+        var body, doc = win.document, docElement = doc.documentElement;
+        if (win.innerWidth) {
+          return {
+            width: win.innerWidth,
+            height: win.innerHeight
+          };
+        }
+        if (docElement) {
+          return {
+            width: docElement.clientWidth,
+            height: docElement.clientHeight
+          };
+        }
+        body = doc.body;
+        return {
+          width: body.clientWidth,
+          height: body.clientHeight
+        };
+      };
+      dom.hasContent = function hasContent(elm) {
+        if (elm.actualNode.textContent.trim() || aria.label(elm)) {
+          return true;
+        }
+        var contentElms = axe.utils.querySelectorAll(elm, '*');
+        for (var i = 0; i < contentElms.length; i++) {
+          if (aria.label(contentElms[i]) || dom.isVisualContent(contentElms[i].actualNode)) {
+            return true;
+          }
+        }
+        return false;
+      };
+      dom.idrefs = function(node, attr) {
+        'use strict';
+        var index, length, doc = dom.getRootNode(node), result = [], idrefs = node.getAttribute(attr);
+        if (idrefs) {
+          idrefs = axe.utils.tokenList(idrefs);
+          for (index = 0, length = idrefs.length; index < length; index++) {
+            result.push(doc.getElementById(idrefs[index]));
+          }
+        }
+        return result;
+      };
+      dom.isFocusable = function(el) {
+        'use strict';
+        if (!el || el.disabled || !dom.isVisible(el) && el.nodeName.toUpperCase() !== 'AREA') {
+          return false;
+        }
+        switch (el.nodeName.toUpperCase()) {
+         case 'A':
+         case 'AREA':
+          if (el.href) {
+            return true;
+          }
+          break;
+
+         case 'INPUT':
+          return el.type !== 'hidden';
+
+         case 'TEXTAREA':
+         case 'SELECT':
+         case 'DETAILS':
+         case 'BUTTON':
+          return true;
+        }
+        var tabindex = el.getAttribute('tabindex');
+        if (tabindex && !isNaN(parseInt(tabindex, 10))) {
+          return true;
+        }
+        return false;
+      };
+      dom.isHTML5 = function(doc) {
+        var node = doc.doctype;
+        if (node === null) {
+          return false;
+        }
+        return node.name === 'html' && !node.publicId && !node.systemId;
+      };
+      function walkDomNode(node, functor) {
+        'use strict';
+        var shouldWalk = functor(node);
+        node = node.firstChild;
+        while (node) {
+          if (shouldWalk !== false) {
+            walkDomNode(node, functor);
+          }
+          node = node.nextSibling;
+        }
+      }
+      var blockLike = [ 'block', 'list-item', 'table', 'flex', 'grid', 'inline-block' ];
+      function isBlock(elm) {
+        'use strict';
+        var display = window.getComputedStyle(elm).getPropertyValue('display');
+        return blockLike.indexOf(display) !== -1 || display.substr(0, 6) === 'table-';
+      }
+      dom.isInTextBlock = function isInTextBlock(node) {
+        'use strict';
+        if (isBlock(node)) {
+          return false;
+        }
+        var parentBlock = node.parentNode;
+        while (parentBlock.nodeType === 1 && !isBlock(parentBlock)) {
+          parentBlock = parentBlock.parentNode;
+        }
+        var parentText = '';
+        var linkText = '';
+        var inBrBlock = 0;
+        walkDomNode(parentBlock, function(currNode) {
+          if (inBrBlock === 2) {
+            return false;
+          }
+          if (currNode.nodeType === 3) {
+            parentText += currNode.nodeValue;
+          }
+          if (currNode.nodeType !== 1) {
+            return;
+          }
+          var nodeName = (currNode.nodeName || '').toUpperCase();
+          if ([ 'BR', 'HR' ].indexOf(nodeName) !== -1) {
+            if (inBrBlock === 0) {
+              parentText = '';
+              linkText = '';
+            } else {
+              inBrBlock = 2;
+            }
+          } else if (currNode.style.display === 'none' || currNode.style.overflow === 'hidden' || [ '', null, 'none' ].indexOf(currNode.style.float) === -1 || [ '', null, 'relative' ].indexOf(currNode.style.position) === -1) {
+            return false;
+          } else if (nodeName === 'A' && currNode.href || (currNode.getAttribute('role') || '').toLowerCase() === 'link') {
+            if (currNode === node) {
+              inBrBlock = 1;
+            }
+            linkText += currNode.textContent;
+            return false;
+          }
+        });
+        parentText = axe.commons.text.sanitize(parentText);
+        linkText = axe.commons.text.sanitize(linkText);
+        return parentText.length > linkText.length;
+      };
+      dom.isNode = function(candidate) {
+        'use strict';
+        return candidate instanceof Node;
+      };
+      dom.isOffscreen = function(element) {
+        'use strict';
+        var noParentScrolled = function noParentScrolled(element, offset) {
+          element = element.parentNode;
+          while (element.nodeName.toLowerCase() !== 'html') {
+            if (element.scrollTop) {
+              offset += element.scrollTop;
+              if (offset >= 0) {
+                return false;
+              }
+            }
+            element = element.parentNode;
+          }
+          return true;
+        };
+        var leftBoundary, docElement = document.documentElement, styl = window.getComputedStyle(element), dir = window.getComputedStyle(document.body || docElement).getPropertyValue('direction'), coords = dom.getElementCoordinates(element);
+        if (coords.bottom < 0 && (noParentScrolled(element, coords.bottom) || styl.position === 'absolute')) {
+          return true;
+        }
+        if (coords.left === 0 && coords.right === 0) {
+          return false;
+        }
+        if (dir === 'ltr') {
+          if (coords.right <= 0) {
+            return true;
+          }
+        } else {
+          leftBoundary = Math.max(docElement.scrollWidth, dom.getViewportSize(window).width);
+          if (coords.left >= leftBoundary) {
+            return true;
+          }
+        }
+        return false;
+      };
+      function isClipped(clip) {
+        'use strict';
+        var matches = clip.match(/rect\s*\(([0-9]+)px,?\s*([0-9]+)px,?\s*([0-9]+)px,?\s*([0-9]+)px\s*\)/);
+        if (matches && matches.length === 5) {
+          return matches[3] - matches[1] <= 0 && matches[2] - matches[4] <= 0;
+        }
+        return false;
+      }
+      dom.isVisible = function(el, screenReader, recursed) {
+        'use strict';
+        var style, nodeName, parent;
+        if (el.nodeType === 9) {
+          return true;
+        }
+        if (el.nodeType === 11) {
+          el = el.host;
+        }
+        style = window.getComputedStyle(el, null);
+        if (style === null) {
+          return false;
+        }
+        nodeName = el.nodeName.toUpperCase();
+        if (style.getPropertyValue('display') === 'none' || nodeName.toUpperCase() === 'STYLE' || nodeName.toUpperCase() === 'SCRIPT' || !screenReader && isClipped(style.getPropertyValue('clip')) || !recursed && (style.getPropertyValue('visibility') === 'hidden' || !screenReader && dom.isOffscreen(el)) || screenReader && el.getAttribute('aria-hidden') === 'true') {
+          return false;
+        }
+        parent = el.assignedSlot ? el.assignedSlot : el.parentNode;
+        if (parent) {
+          return dom.isVisible(parent, screenReader, true);
+        }
+        return false;
+      };
+      var visualRoles = [ 'checkbox', 'img', 'radio', 'range', 'slider', 'spinbutton', 'textbox' ];
+      dom.isVisualContent = function(candidate) {
+        var role = candidate.getAttribute('role');
+        if (role) {
+          return visualRoles.indexOf(role) !== -1;
+        }
+        switch (candidate.tagName.toUpperCase()) {
+         case 'IMG':
+         case 'IFRAME':
+         case 'OBJECT':
+         case 'VIDEO':
+         case 'AUDIO':
+         case 'CANVAS':
+         case 'SVG':
+         case 'MATH':
+         case 'BUTTON':
+         case 'SELECT':
+         case 'TEXTAREA':
+         case 'KEYGEN':
+         case 'PROGRESS':
+         case 'METER':
+          return true;
+
+         case 'INPUT':
+          return candidate.type !== 'hidden';
+
+         default:
+          return false;
+        }
+      };
+      dom.visuallyContains = function(node, parent) {
+        var rectBound = node.getBoundingClientRect();
+        var margin = .01;
+        var rect = {
+          top: rectBound.top + margin,
+          bottom: rectBound.bottom - margin,
+          left: rectBound.left + margin,
+          right: rectBound.right - margin
+        };
+        var parentRect = parent.getBoundingClientRect();
+        var parentTop = parentRect.top;
+        var parentLeft = parentRect.left;
+        var parentScrollArea = {
+          top: parentTop - parent.scrollTop,
+          bottom: parentTop - parent.scrollTop + parent.scrollHeight,
+          left: parentLeft - parent.scrollLeft,
+          right: parentLeft - parent.scrollLeft + parent.scrollWidth
+        };
+        var style = window.getComputedStyle(parent);
+        if (style.getPropertyValue('display') === 'inline') {
+          return true;
+        }
+        if (rect.left < parentScrollArea.left && rect.left < parentRect.left || rect.top < parentScrollArea.top && rect.top < parentRect.top || rect.right > parentScrollArea.right && rect.right > parentRect.right || rect.bottom > parentScrollArea.bottom && rect.bottom > parentRect.bottom) {
+          return false;
+        }
+        if (rect.right > parentRect.right || rect.bottom > parentRect.bottom) {
+          return style.overflow === 'scroll' || style.overflow === 'auto' || style.overflow === 'hidden' || parent instanceof HTMLBodyElement || parent instanceof HTMLHtmlElement;
+        }
+        return true;
+      };
+      dom.visuallyOverlaps = function(rect, parent) {
+        var parentRect = parent.getBoundingClientRect();
+        var parentTop = parentRect.top;
+        var parentLeft = parentRect.left;
+        var parentScrollArea = {
+          top: parentTop - parent.scrollTop,
+          bottom: parentTop - parent.scrollTop + parent.scrollHeight,
+          left: parentLeft - parent.scrollLeft,
+          right: parentLeft - parent.scrollLeft + parent.scrollWidth
+        };
+        if (rect.left > parentScrollArea.right && rect.left > parentRect.right || rect.top > parentScrollArea.bottom && rect.top > parentRect.bottom || rect.right < parentScrollArea.left && rect.right < parentRect.left || rect.bottom < parentScrollArea.top && rect.bottom < parentRect.top) {
+          return false;
+        }
+        var style = window.getComputedStyle(parent);
+        if (rect.left > parentRect.right || rect.top > parentRect.bottom) {
+          return style.overflow === 'scroll' || style.overflow === 'auto' || parent instanceof HTMLBodyElement || parent instanceof HTMLHtmlElement;
+        }
+        return true;
+      };
+      table.getAllCells = function(tableElm) {
+        var rowIndex, cellIndex, rowLength, cellLength;
+        var cells = [];
+        for (rowIndex = 0, rowLength = tableElm.rows.length; rowIndex < rowLength; rowIndex++) {
+          for (cellIndex = 0, cellLength = tableElm.rows[rowIndex].cells.length; cellIndex < cellLength; cellIndex++) {
+            cells.push(tableElm.rows[rowIndex].cells[cellIndex]);
+          }
+        }
+        return cells;
+      };
+      table.getCellPosition = function(cell, tableGrid) {
+        var rowIndex, index;
+        if (!tableGrid) {
+          tableGrid = table.toGrid(dom.findUp(cell, 'table'));
+        }
+        for (rowIndex = 0; rowIndex < tableGrid.length; rowIndex++) {
+          if (tableGrid[rowIndex]) {
+            index = tableGrid[rowIndex].indexOf(cell);
+            if (index !== -1) {
+              return {
+                x: index,
+                y: rowIndex
+              };
+            }
+          }
+        }
+      };
+      table.getHeaders = function(cell) {
+        if (cell.hasAttribute('headers')) {
+          return commons.dom.idrefs(cell, 'headers');
+        }
+        var tableGrid = commons.table.toGrid(commons.dom.findUp(cell, 'table'));
+        var position = commons.table.getCellPosition(cell, tableGrid);
+        var rowHeaders = table.traverse('left', position, tableGrid).filter(function(cell) {
+          return table.isRowHeader(cell);
+        });
+        var colHeaders = table.traverse('up', position, tableGrid).filter(function(cell) {
+          return table.isColumnHeader(cell);
+        });
+        return [].concat(rowHeaders, colHeaders).reverse();
+      };
+      table.getScope = function(cell) {
+        var scope = cell.getAttribute('scope');
+        var role = cell.getAttribute('role');
+        if (cell instanceof Element === false || [ 'TD', 'TH' ].indexOf(cell.nodeName.toUpperCase()) === -1) {
+          throw new TypeError('Expected TD or TH element');
+        }
+        if (role === 'columnheader') {
+          return 'col';
+        } else if (role === 'rowheader') {
+          return 'row';
+        } else if (scope === 'col' || scope === 'row') {
+          return scope;
+        } else if (cell.nodeName.toUpperCase() !== 'TH') {
+          return false;
+        }
+        var tableGrid = table.toGrid(dom.findUp(cell, 'table'));
+        var pos = table.getCellPosition(cell);
+        var headerRow = tableGrid[pos.y].reduce(function(headerRow, cell) {
+          return headerRow && cell.nodeName.toUpperCase() === 'TH';
+        }, true);
+        if (headerRow) {
+          return 'col';
+        }
+        var headerCol = tableGrid.map(function(col) {
+          return col[pos.x];
+        }).reduce(function(headerCol, cell) {
+          return headerCol && cell.nodeName.toUpperCase() === 'TH';
+        }, true);
+        if (headerCol) {
+          return 'row';
+        }
+        return 'auto';
+      };
+      table.isColumnHeader = function(node) {
+        return [ 'col', 'auto' ].indexOf(table.getScope(node)) !== -1;
+      };
+      table.isDataCell = function(cell) {
+        if (!cell.children.length && !cell.textContent.trim()) {
+          return false;
+        }
+        return cell.nodeName.toUpperCase() === 'TD';
+      };
+      table.isDataTable = function(node) {
+        var role = node.getAttribute('role');
+        if ((role === 'presentation' || role === 'none') && !dom.isFocusable(node)) {
+          return false;
+        }
+        if (node.getAttribute('contenteditable') === 'true' || dom.findUp(node, '[contenteditable="true"]')) {
+          return true;
+        }
+        if (role === 'grid' || role === 'treegrid' || role === 'table') {
+          return true;
+        }
+        if (commons.aria.getRoleType(role) === 'landmark') {
+          return true;
+        }
+        if (node.getAttribute('datatable') === '0') {
+          return false;
+        }
+        if (node.getAttribute('summary')) {
+          return true;
+        }
+        if (node.tHead || node.tFoot || node.caption) {
+          return true;
+        }
+        for (var childIndex = 0, childLength = node.children.length; childIndex < childLength; childIndex++) {
+          if (node.children[childIndex].nodeName.toUpperCase() === 'COLGROUP') {
+            return true;
+          }
+        }
+        var cells = 0;
+        var rowLength = node.rows.length;
+        var row, cell;
+        var hasBorder = false;
+        for (var rowIndex = 0; rowIndex < rowLength; rowIndex++) {
+          row = node.rows[rowIndex];
+          for (var cellIndex = 0, cellLength = row.cells.length; cellIndex < cellLength; cellIndex++) {
+            cell = row.cells[cellIndex];
+            if (cell.nodeName.toUpperCase() === 'TH') {
+              return true;
+            }
+            if (!hasBorder && (cell.offsetWidth !== cell.clientWidth || cell.offsetHeight !== cell.clientHeight)) {
+              hasBorder = true;
+            }
+            if (cell.getAttribute('scope') || cell.getAttribute('headers') || cell.getAttribute('abbr')) {
+              return true;
+            }
+            if ([ 'columnheader', 'rowheader' ].indexOf(cell.getAttribute('role')) !== -1) {
+              return true;
+            }
+            if (cell.children.length === 1 && cell.children[0].nodeName.toUpperCase() === 'ABBR') {
+              return true;
+            }
+            cells++;
+          }
+        }
+        if (node.getElementsByTagName('table').length) {
+          return false;
+        }
+        if (rowLength < 2) {
+          return false;
+        }
+        var sampleRow = node.rows[Math.ceil(rowLength / 2)];
+        if (sampleRow.cells.length === 1 && sampleRow.cells[0].colSpan === 1) {
+          return false;
+        }
+        if (sampleRow.cells.length >= 5) {
+          return true;
+        }
+        if (hasBorder) {
+          return true;
+        }
+        var bgColor, bgImage;
+        for (rowIndex = 0; rowIndex < rowLength; rowIndex++) {
+          row = node.rows[rowIndex];
+          if (bgColor && bgColor !== window.getComputedStyle(row).getPropertyValue('background-color')) {
+            return true;
+          } else {
+            bgColor = window.getComputedStyle(row).getPropertyValue('background-color');
+          }
+          if (bgImage && bgImage !== window.getComputedStyle(row).getPropertyValue('background-image')) {
+            return true;
+          } else {
+            bgImage = window.getComputedStyle(row).getPropertyValue('background-image');
+          }
+        }
+        if (rowLength >= 20) {
+          return true;
+        }
+        if (dom.getElementCoordinates(node).width > dom.getViewportSize(window).width * .95) {
+          return false;
+        }
+        if (cells < 10) {
+          return false;
+        }
+        if (node.querySelector('object, embed, iframe, applet')) {
+          return false;
+        }
+        return true;
+      };
+      table.isHeader = function(cell) {
+        if (table.isColumnHeader(cell) || table.isRowHeader(cell)) {
+          return true;
+        }
+        if (cell.id) {
+          return !!document.querySelector('[headers~="' + axe.utils.escapeSelector(cell.id) + '"]');
+        }
+        return false;
+      };
+      table.isRowHeader = function(node) {
+        return [ 'row', 'auto' ].indexOf(table.getScope(node)) !== -1;
+      };
+      table.toGrid = function(node) {
+        var table = [];
+        var rows = node.rows;
+        for (var i = 0, rowLength = rows.length; i < rowLength; i++) {
+          var cells = rows[i].cells;
+          table[i] = table[i] || [];
+          var columnIndex = 0;
+          for (var j = 0, cellLength = cells.length; j < cellLength; j++) {
+            for (var colSpan = 0; colSpan < cells[j].colSpan; colSpan++) {
+              for (var rowSpan = 0; rowSpan < cells[j].rowSpan; rowSpan++) {
+                table[i + rowSpan] = table[i + rowSpan] || [];
+                while (table[i + rowSpan][columnIndex]) {
+                  columnIndex++;
+                }
+                table[i + rowSpan][columnIndex] = cells[j];
+              }
+              columnIndex++;
+            }
+          }
+        }
+        return table;
+      };
+      table.toArray = table.toGrid;
+      (function(table) {
+        var traverseTable = function traverseTable(dir, position, tableGrid, callback) {
+          var result;
+          var cell = tableGrid[position.y] ? tableGrid[position.y][position.x] : undefined;
+          if (!cell) {
+            return [];
+          }
+          if (typeof callback === 'function') {
+            result = callback(cell, position, tableGrid);
+            if (result === true) {
+              return [ cell ];
+            }
+          }
+          result = traverseTable(dir, {
+            x: position.x + dir.x,
+            y: position.y + dir.y
+          }, tableGrid, callback);
+          result.unshift(cell);
+          return result;
+        };
+        table.traverse = function(dir, startPos, tableGrid, callback) {
+          if (Array.isArray(startPos)) {
+            callback = tableGrid;
+            tableGrid = startPos;
+            startPos = {
+              x: 0,
+              y: 0
+            };
+          }
+          if (typeof dir === 'string') {
+            switch (dir) {
+             case 'left':
+              dir = {
+                x: -1,
+                y: 0
+              };
+              break;
+
+             case 'up':
+              dir = {
+                x: 0,
+                y: -1
+              };
+              break;
+
+             case 'right':
+              dir = {
+                x: 1,
+                y: 0
+              };
+              break;
+
+             case 'down':
+              dir = {
+                x: 0,
+                y: 1
+              };
+              break;
+            }
+          }
+          return traverseTable(dir, {
+            x: startPos.x + dir.x,
+            y: startPos.y + dir.y
+          }, tableGrid, callback);
+        };
+      })(table);
+      var defaultButtonValues = {
+        submit: 'Submit',
+        reset: 'Reset'
+      };
+      var inputTypes = [ 'text', 'search', 'tel', 'url', 'email', 'date', 'time', 'number', 'range', 'color' ];
+      var phrasingElements = [ 'A', 'EM', 'STRONG', 'SMALL', 'MARK', 'ABBR', 'DFN', 'I', 'B', 'S', 'U', 'CODE', 'VAR', 'SAMP', 'KBD', 'SUP', 'SUB', 'Q', 'CITE', 'SPAN', 'BDO', 'BDI', 'BR', 'WBR', 'INS', 'DEL', 'IMG', 'EMBED', 'OBJECT', 'IFRAME', 'MAP', 'AREA', 'SCRIPT', 'NOSCRIPT', 'RUBY', 'VIDEO', 'AUDIO', 'INPUT', 'TEXTAREA', 'SELECT', 'BUTTON', 'LABEL', 'OUTPUT', 'DATALIST', 'KEYGEN', 'PROGRESS', 'COMMAND', 'CANVAS', 'TIME', 'METER' ];
+      function findLabel(element) {
+        var ref = null;
+        if (element.id) {
+          ref = document.querySelector('label[for="' + axe.utils.escapeSelector(element.id) + '"]');
+          if (ref) {
+            return ref;
+          }
+        }
+        ref = dom.findUp(element, 'label');
+        return ref;
+      }
+      function isButton(element) {
+        return [ 'button', 'reset', 'submit' ].indexOf(element.type) !== -1;
+      }
+      function isInput(element) {
+        var nodeName = element.nodeName.toUpperCase();
+        return nodeName === 'TEXTAREA' || nodeName === 'SELECT' || nodeName === 'INPUT' && element.type.toLowerCase() !== 'hidden';
+      }
+      function shouldCheckSubtree(element) {
+        return [ 'BUTTON', 'SUMMARY', 'A' ].indexOf(element.nodeName.toUpperCase()) !== -1;
+      }
+      function shouldNeverCheckSubtree(element) {
+        return [ 'TABLE', 'FIGURE' ].indexOf(element.nodeName.toUpperCase()) !== -1;
+      }
+      function formValueText(element) {
+        var nodeName = element.nodeName.toUpperCase();
+        if (nodeName === 'INPUT') {
+          if (!element.hasAttribute('type') || inputTypes.indexOf(element.getAttribute('type').toLowerCase()) !== -1 && element.value) {
+            return element.value;
+          }
+          return '';
+        }
+        if (nodeName === 'SELECT') {
+          var opts = element.options;
+          if (opts && opts.length) {
+            var returnText = '';
+            for (var i = 0; i < opts.length; i++) {
+              if (opts[i].selected) {
+                returnText += ' ' + opts[i].text;
+              }
+            }
+            return text.sanitize(returnText);
+          }
+          return '';
+        }
+        if (nodeName === 'TEXTAREA' && element.value) {
+          return element.value;
+        }
+        return '';
+      }
+      function checkDescendant(element, nodeName) {
+        var candidate = element.querySelector(nodeName.toLowerCase());
+        if (candidate) {
+          return text.accessibleText(candidate);
+        }
+        return '';
+      }
+      function isEmbeddedControl(e) {
+        if (!e) {
+          return false;
+        }
+        switch (e.nodeName.toUpperCase()) {
+         case 'SELECT':
+         case 'TEXTAREA':
+          return true;
+
+         case 'INPUT':
+          return !e.hasAttribute('type') || inputTypes.indexOf(e.getAttribute('type').toLowerCase()) !== -1;
+
+         default:
+          return false;
+        }
+      }
+      function shouldCheckAlt(element) {
+        var nodeName = element.nodeName.toUpperCase();
+        return nodeName === 'INPUT' && element.type.toLowerCase() === 'image' || [ 'IMG', 'APPLET', 'AREA' ].indexOf(nodeName) !== -1;
+      }
+      function nonEmptyText(t) {
+        return !!text.sanitize(t);
+      }
+      text.accessibleText = function(element, inLabelledByContext) {
+        var accessibleNameComputation;
+        var encounteredNodes = [];
+        function getInnerText(element, inLabelledByContext, inControlContext) {
+          var nodes = element.childNodes;
+          var returnText = '';
+          var node;
+          for (var i = 0; i < nodes.length; i++) {
+            node = nodes[i];
+            if (node.nodeType === 3) {
+              returnText += node.textContent;
+            } else if (node.nodeType === 1) {
+              if (phrasingElements.indexOf(node.nodeName.toUpperCase()) === -1) {
+                returnText += ' ';
+              }
+              returnText += accessibleNameComputation(nodes[i], inLabelledByContext, inControlContext);
+            }
+          }
+          return returnText;
+        }
+        function checkNative(element, inLabelledByContext, inControlContext) {
+          var returnText = '';
+          var nodeName = element.nodeName.toUpperCase();
+          if (shouldCheckSubtree(element)) {
+            returnText = getInnerText(element, false, false) || '';
+            if (nonEmptyText(returnText)) {
+              return returnText;
+            }
+          }
+          if (nodeName === 'FIGURE') {
+            returnText = checkDescendant(element, 'figcaption');
+            if (nonEmptyText(returnText)) {
+              return returnText;
+            }
+          }
+          if (nodeName === 'TABLE') {
+            returnText = checkDescendant(element, 'caption');
+            if (nonEmptyText(returnText)) {
+              return returnText;
+            }
+            returnText = element.getAttribute('title') || element.getAttribute('summary') || '';
+            if (nonEmptyText(returnText)) {
+              return returnText;
+            }
+          }
+          if (shouldCheckAlt(element)) {
+            return element.getAttribute('alt') || '';
+          }
+          if (isInput(element) && !inControlContext) {
+            if (isButton(element)) {
+              return element.value || element.title || defaultButtonValues[element.type] || '';
+            }
+            var labelElement = findLabel(element);
+            if (labelElement) {
+              return accessibleNameComputation(labelElement, inLabelledByContext, true);
+            }
+          }
+          return '';
+        }
+        function checkARIA(element, inLabelledByContext, inControlContext) {
+          if (!inLabelledByContext && element.hasAttribute('aria-labelledby')) {
+            return text.sanitize(dom.idrefs(element, 'aria-labelledby').map(function(l) {
+              if (element === l) {
+                encounteredNodes.pop();
+              }
+              return accessibleNameComputation(l, true, element !== l);
+            }).join(' '));
+          }
+          if (!(inControlContext && isEmbeddedControl(element)) && element.hasAttribute('aria-label')) {
+            return text.sanitize(element.getAttribute('aria-label'));
+          }
+          return '';
+        }
+        accessibleNameComputation = function accessibleNameComputation(element, inLabelledByContext, inControlContext) {
+          'use strict';
+          var returnText;
+          if (element === null || encounteredNodes.indexOf(element) !== -1) {
+            return '';
+          } else if (!inLabelledByContext && !dom.isVisible(element, true)) {
+            return '';
+          }
+          encounteredNodes.push(element);
+          var role = element.getAttribute('role');
+          returnText = checkARIA(element, inLabelledByContext, inControlContext);
+          if (nonEmptyText(returnText)) {
+            return returnText;
+          }
+          returnText = checkNative(element, inLabelledByContext, inControlContext);
+          if (nonEmptyText(returnText)) {
+            return returnText;
+          }
+          if (inControlContext) {
+            returnText = formValueText(element);
+            if (nonEmptyText(returnText)) {
+              return returnText;
+            }
+          }
+          if (!shouldNeverCheckSubtree(element) && (!role || aria.getRolesWithNameFromContents().indexOf(role) !== -1)) {
+            returnText = getInnerText(element, inLabelledByContext, inControlContext);
+            if (nonEmptyText(returnText)) {
+              return returnText;
+            }
+          }
+          if (element.hasAttribute('title')) {
+            return element.getAttribute('title');
+          }
+          return '';
+        };
+        return text.sanitize(accessibleNameComputation(element, inLabelledByContext));
+      };
+      text.label = function(node) {
+        var ref, candidate, doc;
+        candidate = aria.label(node);
+        if (candidate) {
+          return candidate;
+        }
+        if (node.actualNode.id) {
+          doc = axe.commons.dom.getRootNode(node.actualNode);
+          ref = doc.querySelector('label[for="' + axe.utils.escapeSelector(node.actualNode.id) + '"]');
+          ref = axe.utils.getNodeFromTree(axe._tree[0], ref);
+          candidate = ref && text.visible(ref, true);
+          if (candidate) {
+            return candidate;
+          }
+        }
+        ref = dom.findUp(node.actualNode, 'label');
+        ref = axe.utils.getNodeFromTree(axe._tree[0], ref);
+        candidate = ref && text.visible(ref, true);
+        if (candidate) {
+          return candidate;
+        }
+        return null;
+      };
+      text.sanitize = function(str) {
+        'use strict';
+        return str.replace(/\r\n/g, '\n').replace(/\u00A0/g, ' ').replace(/[\s]{2,}/g, ' ').trim();
+      };
+      text.visible = function(element, screenReader, noRecursing) {
+        'use strict';
+        var index, child, nodeValue, childNodes = element.children, length = childNodes.length, result = '';
+        for (index = 0; index < length; index++) {
+          child = childNodes[index];
+          if (child.actualNode.nodeType === 3) {
+            nodeValue = child.actualNode.nodeValue;
+            if (nodeValue && dom.isVisible(element.actualNode, screenReader)) {
+              result += nodeValue;
+            }
+          } else if (!noRecursing) {
+            result += text.visible(child, screenReader);
+          }
+        }
+        return text.sanitize(result);
+      };
+      axe.utils.toArray = function(thing) {
+        'use strict';
+        return Array.prototype.slice.call(thing);
+      };
+      axe.utils.tokenList = function(str) {
+        'use strict';
+        return str.trim().replace(/\s{2,}/g, ' ').split(' ');
+      };
+      var langs = [ 'aa', 'ab', 'ae', 'af', 'ak', 'am', 'an', 'ar', 'as', 'av', 'ay', 'az', 'ba', 'be', 'bg', 'bh', 'bi', 'bm', 'bn', 'bo', 'br', 'bs', 'ca', 'ce', 'ch', 'co', 'cr', 'cs', 'cu', 'cv', 'cy', 'da', 'de', 'dv', 'dz', 'ee', 'el', 'en', 'eo', 'es', 'et', 'eu', 'fa', 'ff', 'fi', 'fj', 'fo', 'fr', 'fy', 'ga', 'gd', 'gl', 'gn', 'gu', 'gv', 'ha', 'he', 'hi', 'ho', 'hr', 'ht', 'hu', 'hy', 'hz', 'ia', 'id', 'ie', 'ig', 'ii', 'ik', 'in', 'io', 'is', 'it', 'iu', 'iw', 'ja', 'ji', 'jv', 'jw', 'ka', 'kg', 'ki', 'kj', 'kk', 'kl', 'km', 'kn', 'ko', 'kr', 'ks', 'ku', 'kv', 'kw', 'ky', 'la', 'lb', 'lg', 'li', 'ln', 'lo', 'lt', 'lu', 'lv', 'mg', 'mh', 'mi', 'mk', 'ml', 'mn', 'mo', 'mr', 'ms', 'mt', 'my', 'na', 'nb', 'nd', 'ne', 'ng', 'nl', 'nn', 'no', 'nr', 'nv', 'ny', 'oc', 'oj', 'om', 'or', 'os', 'pa', 'pi', 'pl', 'ps', 'pt', 'qu', 'rm', 'rn', 'ro', 'ru', 'rw', 'sa', 'sc', 'sd', 'se', 'sg', 'sh', 'si', 'sk', 'sl', 'sm', 'sn', 'so', 'sq', 'sr', 'ss', 'st', 'su', 'sv', 'sw', 'ta', 'te', 'tg', 'th', 'ti', 'tk', 'tl', 'tn', 'to', 'tr', 'ts', 'tt', 'tw', 'ty', 'ug', 'uk', 'ur', 'uz', 've', 'vi', 'vo', 'wa', 'wo', 'xh', 'yi', 'yo', 'za', 'zh', 'zu', 'aaa', 'aab', 'aac', 'aad', 'aae', 'aaf', 'aag', 'aah', 'aai', 'aak', 'aal', 'aam', 'aan', 'aao', 'aap', 'aaq', 'aas', 'aat', 'aau', 'aav', 'aaw', 'aax', 'aaz', 'aba', 'abb', 'abc', 'abd', 'abe', 'abf', 'abg', 'abh', 'abi', 'abj', 'abl', 'abm', 'abn', 'abo', 'abp', 'abq', 'abr', 'abs', 'abt', 'abu', 'abv', 'abw', 'abx', 'aby', 'abz', 'aca', 'acb', 'acd', 'ace', 'acf', 'ach', 'aci', 'ack', 'acl', 'acm', 'acn', 'acp', 'acq', 'acr', 'acs', 'act', 'acu', 'acv', 'acw', 'acx', 'acy', 'acz', 'ada', 'adb', 'add', 'ade', 'adf', 'adg', 'adh', 'adi', 'adj', 'adl', 'adn', 'ado', 'adp', 'adq', 'adr', 'ads', 'adt', 'adu', 'adw', 'adx', 'ady', 'adz', 'aea', 'aeb', 'aec', 'aed', 'aee', 'aek', 'ael', 'aem', 'aen', 'aeq', 'aer', 'aes', 'aeu', 'aew', 'aey', 'aez', 'afa', 'afb', 'afd', 'afe', 'afg', 'afh', 'afi', 'afk', 'afn', 'afo', 'afp', 'afs', 'aft', 'afu', 'afz', 'aga', 'agb', 'agc', 'agd', 'age', 'agf', 'agg', 'agh', 'agi', 'agj', 'agk', 'agl', 'agm', 'agn', 'ago', 'agp', 'agq', 'agr', 'ags', 'agt', 'agu', 'agv', 'agw', 'agx', 'agy', 'agz', 'aha', 'ahb', 'ahg', 'ahh', 'ahi', 'ahk', 'ahl', 'ahm', 'ahn', 'aho', 'ahp', 'ahr', 'ahs', 'aht', 'aia', 'aib', 'aic', 'aid', 'aie', 'aif', 'aig', 'aih', 'aii', 'aij', 'aik', 'ail', 'aim', 'ain', 'aio', 'aip', 'aiq', 'air', 'ais', 'ait', 'aiw', 'aix', 'aiy', 'aja', 'ajg', 'aji', 'ajn', 'ajp', 'ajt', 'aju', 'ajw', 'ajz', 'akb', 'akc', 'akd', 'ake', 'akf', 'akg', 'akh', 'aki', 'akj', 'akk', 'akl', 'akm', 'ako', 'akp', 'akq', 'akr', 'aks', 'akt', 'aku', 'akv', 'akw', 'akx', 'aky', 'akz', 'ala', 'alc', 'ald', 'ale', 'alf', 'alg', 'alh', 'ali', 'alj', 'alk', 'all', 'alm', 'aln', 'alo', 'alp', 'alq', 'alr', 'als', 'alt', 'alu', 'alv', 'alw', 'alx', 'aly', 'alz', 'ama', 'amb', 'amc', 'ame', 'amf', 'amg', 'ami', 'amj', 'amk', 'aml', 'amm', 'amn', 'amo', 'amp', 'amq', 'amr', 'ams', 'amt', 'amu', 'amv', 'amw', 'amx', 'amy', 'amz', 'ana', 'anb', 'anc', 'and', 'ane', 'anf', 'ang', 'anh', 'ani', 'anj', 'ank', 'anl', 'anm', 'ann', 'ano', 'anp', 'anq', 'anr', 'ans', 'ant', 'anu', 'anv', 'anw', 'anx', 'any', 'anz', 'aoa', 'aob', 'aoc', 'aod', 'aoe', 'aof', 'aog', 'aoh', 'aoi', 'aoj', 'aok', 'aol', 'aom', 'aon', 'aor', 'aos', 'aot', 'aou', 'aox', 'aoz', 'apa', 'apb', 'apc', 'apd', 'ape', 'apf', 'apg', 'aph', 'api', 'apj', 'apk', 'apl', 'apm', 'apn', 'apo', 'app', 'apq', 'apr', 'aps', 'apt', 'apu', 'apv', 'apw', 'apx', 'apy', 'apz', 'aqa', 'aqc', 'aqd', 'aqg', 'aql', 'aqm', 'aqn', 'aqp', 'aqr', 'aqt', 'aqz', 'arb', 'arc', 'ard', 'are', 'arh', 'ari', 'arj', 'ark', 'arl', 'arn', 'aro', 'arp', 'arq', 'arr', 'ars', 'art', 'aru', 'arv', 'arw', 'arx', 'ary', 'arz', 'asa', 'asb', 'asc', 'asd', 'ase', 'asf', 'asg', 'ash', 'asi', 'asj', 'ask', 'asl', 'asn', 'aso', 'asp', 'asq', 'asr', 'ass', 'ast', 'asu', 'asv', 'asw', 'asx', 'asy', 'asz', 'ata', 'atb', 'atc', 'atd', 'ate', 'atg', 'ath', 'ati', 'atj', 'atk', 'atl', 'atm', 'atn', 'ato', 'atp', 'atq', 'atr', 'ats', 'att', 'atu', 'atv', 'atw', 'atx', 'aty', 'atz', 'aua', 'aub', 'auc', 'aud', 'aue', 'auf', 'aug', 'auh', 'aui', 'auj', 'auk', 'aul', 'aum', 'aun', 'auo', 'aup', 'auq', 'aur', 'aus', 'aut', 'auu', 'auw', 'aux', 'auy', 'auz', 'avb', 'avd', 'avi', 'avk', 'avl', 'avm', 'avn', 'avo', 'avs', 'avt', 'avu', 'avv', 'awa', 'awb', 'awc', 'awd', 'awe', 'awg', 'awh', 'awi', 'awk', 'awm', 'awn', 'awo', 'awr', 'aws', 'awt', 'awu', 'awv', 'aww', 'awx', 'awy', 'axb', 'axe', 'axg', 'axk', 'axl', 'axm', 'axx', 'aya', 'ayb', 'ayc', 'ayd', 'aye', 'ayg', 'ayh', 'ayi', 'ayk', 'ayl', 'ayn', 'ayo', 'ayp', 'ayq', 'ayr', 'ays', 'ayt', 'ayu', 'ayx', 'ayy', 'ayz', 'aza', 'azb', 'azc', 'azd', 'azg', 'azj', 'azm', 'azn', 'azo', 'azt', 'azz', 'baa', 'bab', 'bac', 'bad', 'bae', 'baf', 'bag', 'bah', 'bai', 'baj', 'bal', 'ban', 'bao', 'bap', 'bar', 'bas', 'bat', 'bau', 'bav', 'baw', 'bax', 'bay', 'baz', 'bba', 'bbb', 'bbc', 'bbd', 'bbe', 'bbf', 'bbg', 'bbh', 'bbi', 'bbj', 'bbk', 'bbl', 'bbm', 'bbn', 'bbo', 'bbp', 'bbq', 'bbr', 'bbs', 'bbt', 'bbu', 'bbv', 'bbw', 'bbx', 'bby', 'bbz', 'bca', 'bcb', 'bcc', 'bcd', 'bce', 'bcf', 'bcg', 'bch', 'bci', 'bcj', 'bck', 'bcl', 'bcm', 'bcn', 'bco', 'bcp', 'bcq', 'bcr', 'bcs', 'bct', 'bcu', 'bcv', 'bcw', 'bcy', 'bcz', 'bda', 'bdb', 'bdc', 'bdd', 'bde', 'bdf', 'bdg', 'bdh', 'bdi', 'bdj', 'bdk', 'bdl', 'bdm', 'bdn', 'bdo', 'bdp', 'bdq', 'bdr', 'bds', 'bdt', 'bdu', 'bdv', 'bdw', 'bdx', 'bdy', 'bdz', 'bea', 'beb', 'bec', 'bed', 'bee', 'bef', 'beg', 'beh', 'bei', 'bej', 'bek', 'bem', 'beo', 'bep', 'beq', 'ber', 'bes', 'bet', 'beu', 'bev', 'bew', 'bex', 'bey', 'bez', 'bfa', 'bfb', 'bfc', 'bfd', 'bfe', 'bff', 'bfg', 'bfh', 'bfi', 'bfj', 'bfk', 'bfl', 'bfm', 'bfn', 'bfo', 'bfp', 'bfq', 'bfr', 'bfs', 'bft', 'bfu', 'bfw', 'bfx', 'bfy', 'bfz', 'bga', 'bgb', 'bgc', 'bgd', 'bge', 'bgf', 'bgg', 'bgi', 'bgj', 'bgk', 'bgl', 'bgm', 'bgn', 'bgo', 'bgp', 'bgq', 'bgr', 'bgs', 'bgt', 'bgu', 'bgv', 'bgw', 'bgx', 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'xfa', 'xga', 'xgb', 'xgd', 'xgf', 'xgg', 'xgi', 'xgl', 'xgm', 'xgn', 'xgr', 'xgu', 'xgw', 'xha', 'xhc', 'xhd', 'xhe', 'xhr', 'xht', 'xhu', 'xhv', 'xia', 'xib', 'xii', 'xil', 'xin', 'xip', 'xir', 'xis', 'xiv', 'xiy', 'xjb', 'xjt', 'xka', 'xkb', 'xkc', 'xkd', 'xke', 'xkf', 'xkg', 'xkh', 'xki', 'xkj', 'xkk', 'xkl', 'xkn', 'xko', 'xkp', 'xkq', 'xkr', 'xks', 'xkt', 'xku', 'xkv', 'xkw', 'xkx', 'xky', 'xkz', 'xla', 'xlb', 'xlc', 'xld', 'xle', 'xlg', 'xli', 'xln', 'xlo', 'xlp', 'xls', 'xlu', 'xly', 'xma', 'xmb', 'xmc', 'xmd', 'xme', 'xmf', 'xmg', 'xmh', 'xmj', 'xmk', 'xml', 'xmm', 'xmn', 'xmo', 'xmp', 'xmq', 'xmr', 'xms', 'xmt', 'xmu', 'xmv', 'xmw', 'xmx', 'xmy', 'xmz', 'xna', 'xnb', 'xnd', 'xng', 'xnh', 'xni', 'xnk', 'xnn', 'xno', 'xnr', 'xns', 'xnt', 'xnu', 'xny', 'xnz', 'xoc', 'xod', 'xog', 'xoi', 'xok', 'xom', 'xon', 'xoo', 'xop', 'xor', 'xow', 'xpa', 'xpc', 'xpe', 'xpg', 'xpi', 'xpj', 'xpk', 'xpm', 'xpn', 'xpo', 'xpp', 'xpq', 'xpr', 'xps', 'xpt', 'xpu', 'xpy', 'xqa', 'xqt', 'xra', 'xrb', 'xrd', 'xre', 'xrg', 'xri', 'xrm', 'xrn', 'xrq', 'xrr', 'xrt', 'xru', 'xrw', 'xsa', 'xsb', 'xsc', 'xsd', 'xse', 'xsh', 'xsi', 'xsj', 'xsl', 'xsm', 'xsn', 'xso', 'xsp', 'xsq', 'xsr', 'xss', 'xsu', 'xsv', 'xsy', 'xta', 'xtb', 'xtc', 'xtd', 'xte', 'xtg', 'xth', 'xti', 'xtj', 'xtl', 'xtm', 'xtn', 'xto', 'xtp', 'xtq', 'xtr', 'xts', 'xtt', 'xtu', 'xtv', 'xtw', 'xty', 'xtz', 'xua', 'xub', 'xud', 'xug', 'xuj', 'xul', 'xum', 'xun', 'xuo', 'xup', 'xur', 'xut', 'xuu', 'xve', 'xvi', 'xvn', 'xvo', 'xvs', 'xwa', 'xwc', 'xwd', 'xwe', 'xwg', 'xwj', 'xwk', 'xwl', 'xwo', 'xwr', 'xwt', 'xww', 'xxb', 'xxk', 'xxm', 'xxr', 'xxt', 'xya', 'xyb', 'xyj', 'xyk', 'xyl', 'xyt', 'xyy', 'xzh', 'xzm', 'xzp', 'yaa', 'yab', 'yac', 'yad', 'yae', 'yaf', 'yag', 'yah', 'yai', 'yaj', 'yak', 'yal', 'yam', 'yan', 'yao', 'yap', 'yaq', 'yar', 'yas', 'yat', 'yau', 'yav', 'yaw', 'yax', 'yay', 'yaz', 'yba', 'ybb', 'ybd', 'ybe', 'ybh', 'ybi', 'ybj', 'ybk', 'ybl', 'ybm', 'ybn', 'ybo', 'ybx', 'yby', 'ych', 'ycl', 'ycn', 'ycp', 'yda', 'ydd', 'yde', 'ydg', 'ydk', 'yds', 'yea', 'yec', 'yee', 'yei', 'yej', 'yel', 'yen', 'yer', 'yes', 'yet', 'yeu', 'yev', 'yey', 'yga', 'ygi', 'ygl', 'ygm', 'ygp', 'ygr', 'ygs', 'ygu', 'ygw', 'yha', 'yhd', 'yhl', 'yhs', 'yia', 'yif', 'yig', 'yih', 'yii', 'yij', 'yik', 'yil', 'yim', 'yin', 'yip', 'yiq', 'yir', 'yis', 'yit', 'yiu', 'yiv', 'yix', 'yiy', 'yiz', 'yka', 'ykg', 'yki', 'ykk', 'ykl', 'ykm', 'ykn', 'yko', 'ykr', 'ykt', 'yku', 'yky', 'yla', 'ylb', 'yle', 'ylg', 'yli', 'yll', 'ylm', 'yln', 'ylo', 'ylr', 'ylu', 'yly', 'yma', 'ymb', 'ymc', 'ymd', 'yme', 'ymg', 'ymh', 'ymi', 'ymk', 'yml', 'ymm', 'ymn', 'ymo', 'ymp', 'ymq', 'ymr', 'yms', 'ymt', 'ymx', 'ymz', 'yna', 'ynd', 'yne', 'yng', 'ynh', 'ynk', 'ynl', 'ynn', 'yno', 'ynq', 'yns', 'ynu', 'yob', 'yog', 'yoi', 'yok', 'yol', 'yom', 'yon', 'yos', 'yot', 'yox', 'yoy', 'ypa', 'ypb', 'ypg', 'yph', 'ypk', 'ypm', 'ypn', 'ypo', 'ypp', 'ypz', 'yra', 'yrb', 'yre', 'yri', 'yrk', 'yrl', 'yrm', 'yrn', 'yro', 'yrs', 'yrw', 'yry', 'ysc', 'ysd', 'ysg', 'ysl', 'ysn', 'yso', 'ysp', 'ysr', 'yss', 'ysy', 'yta', 'ytl', 'ytp', 'ytw', 'yty', 'yua', 'yub', 'yuc', 'yud', 'yue', 'yuf', 'yug', 'yui', 'yuj', 'yuk', 'yul', 'yum', 'yun', 'yup', 'yuq', 'yur', 'yut', 'yuu', 'yuw', 'yux', 'yuy', 'yuz', 'yva', 'yvt', 'ywa', 'ywg', 'ywl', 'ywn', 'ywq', 'ywr', 'ywt', 'ywu', 'yww', 'yxa', 'yxg', 'yxl', 'yxm', 'yxu', 'yxy', 'yyr', 'yyu', 'yyz', 'yzg', 'yzk', 'zaa', 'zab', 'zac', 'zad', 'zae', 'zaf', 'zag', 'zah', 'zai', 'zaj', 'zak', 'zal', 'zam', 'zao', 'zap', 'zaq', 'zar', 'zas', 'zat', 'zau', 'zav', 'zaw', 'zax', 'zay', 'zaz', 'zbc', 'zbe', 'zbl', 'zbt', 'zbw', 'zca', 'zch', 'zdj', 'zea', 'zeg', 'zeh', 'zen', 'zga', 'zgb', 'zgh', 'zgm', 'zgn', 'zgr', 'zhb', 'zhd', 'zhi', 'zhn', 'zhw', 'zhx', 'zia', 'zib', 'zik', 'zil', 'zim', 'zin', 'zir', 'ziw', 'ziz', 'zka', 'zkb', 'zkd', 'zkg', 'zkh', 'zkk', 'zkn', 'zko', 'zkp', 'zkr', 'zkt', 'zku', 'zkv', 'zkz', 'zle', 'zlj', 'zlm', 'zln', 'zlq', 'zls', 'zlw', 'zma', 'zmb', 'zmc', 'zmd', 'zme', 'zmf', 'zmg', 'zmh', 'zmi', 'zmj', 'zmk', 'zml', 'zmm', 'zmn', 'zmo', 'zmp', 'zmq', 'zmr', 'zms', 'zmt', 'zmu', 'zmv', 'zmw', 'zmx', 'zmy', 'zmz', 'zna', 'znd', 'zne', 'zng', 'znk', 'zns', 'zoc', 'zoh', 'zom', 'zoo', 'zoq', 'zor', 'zos', 'zpa', 'zpb', 'zpc', 'zpd', 'zpe', 'zpf', 'zpg', 'zph', 'zpi', 'zpj', 'zpk', 'zpl', 'zpm', 'zpn', 'zpo', 'zpp', 'zpq', 'zpr', 'zps', 'zpt', 'zpu', 'zpv', 'zpw', 'zpx', 'zpy', 'zpz', 'zqe', 'zra', 'zrg', 'zrn', 'zro', 'zrp', 'zrs', 'zsa', 'zsk', 'zsl', 'zsm', 'zsr', 'zsu', 'zte', 'ztg', 'ztl', 'ztm', 'ztn', 'ztp', 'ztq', 'zts', 'ztt', 'ztu', 'ztx', 'zty', 'zua', 'zuh', 'zum', 'zun', 'zuy', 'zwa', 'zxx', 'zyb', 'zyg', 'zyj', 'zyn', 'zyp', 'zza', 'zzj' ];
+      axe.utils.validLangs = function() {
+        'use strict';
+        return langs;
+      };
+      return commons;
+    }()
+  });
+})(typeof window === 'object' ? window : this);