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third_party/polymer/components/paper-input/paper-input.html

 <!--
 @license
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
 
@@ skipping 56 matching lines @@
 @demo demo/index.html
 -->
 
 <dom-module id="paper-input">
   <template>
     <style>
       :host {
         display: block;
       }
 
+      :host([hidden]) {
+        display: none !important;
+      }
+
       input::-webkit-input-placeholder {
         color: var(--paper-input-container-color, --secondary-text-color);
       }
 
       input:-moz-placeholder {
         color: var(--paper-input-container-color, --secondary-text-color);
       }
 
       input::-moz-placeholder {
         color: var(--paper-input-container-color, --secondary-text-color);
       }
 
       input:-ms-input-placeholder {
         color: var(--paper-input-container-color, --secondary-text-color);
       }
     </style>
 
     <paper-input-container no-label-float="[[noLabelFloat]]" always-float-label="[[_computeAlwaysFloatLabel(alwaysFloatLabel,placeholder)]]" auto-validate$="[[autoValidate]]" disabled$="[[disabled]]" invalid="[[invalid]]">
 
       <content select="[prefix]"></content>
 
-      <label hidden$="[[!label]]">[[label]]</label>
+      <label hidden$="[[!label]]" aria-hidden="true">[[label]]</label>
 
       <input is="iron-input" id="input"
         aria-labelledby$="[[_ariaLabelledBy]]"
         aria-describedby$="[[_ariaDescribedBy]]"
         disabled$="[[disabled]]"
         title$="[[title]]"
         bind-value="{{value}}"
         invalid="{{invalid}}"
         prevent-invalid-input="[[preventInvalidInput]]"
         allowed-pattern="[[allowedPattern]]"
@@ skipping 40 matching lines @@
 <script>
   Polymer({
     is: 'paper-input',
 
     behaviors: [
       Polymer.IronFormElementBehavior,
       Polymer.PaperInputBehavior
     ]
   });
 </script>