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1 <!-- | |
2 @license | |
3 Copyright (c) 2015 The Polymer Project Authors. All rights reserved. | |
4 This code may only be used under the BSD style license found at http://polymer.g
ithub.io/LICENSE.txt | |
5 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt | |
6 The complete set of contributors may be found at http://polymer.github.io/CONTRI
BUTORS.txt | |
7 Code distributed by Google as part of the polymer project is also | |
8 subject to an additional IP rights grant found at http://polymer.github.io/PATEN
TS.txt | |
9 --> | |
10 | |
11 <link rel="import" href="../polymer/polymer.html"> | |
12 <link rel="import" href="../iron-meta/iron-meta.html"> | |
13 | |
14 <script> | |
15 | |
16 /** | |
17 * Use `Polymer.IronValidatableBehavior` to implement an element that validate
s user input. | |
18 * | |
19 * ### Accessiblity | |
20 * | |
21 * Changing the `invalid` property, either manually or by calling `validate()`
will update the | |
22 * `aria-invalid` attribute. | |
23 * | |
24 * @demo demo/index.html | |
25 * @polymerBehavior | |
26 */ | |
27 Polymer.IronValidatableBehavior = { | |
28 | |
29 properties: { | |
30 | |
31 /** | |
32 * Namespace for this validator. | |
33 */ | |
34 validatorType: { | |
35 type: String, | |
36 value: 'validator' | |
37 }, | |
38 | |
39 /** | |
40 * Name of the validator to use. | |
41 */ | |
42 validator: { | |
43 type: String | |
44 }, | |
45 | |
46 /** | |
47 * True if the last call to `validate` is invalid. | |
48 */ | |
49 invalid: { | |
50 reflectToAttribute: true, | |
51 type: Boolean, | |
52 value: false | |
53 }, | |
54 | |
55 _validatorMeta: { | |
56 type: Object | |
57 } | |
58 | |
59 }, | |
60 | |
61 observers: [ | |
62 '_invalidChanged(invalid)' | |
63 ], | |
64 | |
65 get _validator() { | |
66 return this._validatorMeta && this._validatorMeta.byKey(this.validator); | |
67 }, | |
68 | |
69 ready: function() { | |
70 this._validatorMeta = new Polymer.IronMeta({type: this.validatorType}); | |
71 }, | |
72 | |
73 _invalidChanged: function() { | |
74 if (this.invalid) { | |
75 this.setAttribute('aria-invalid', 'true'); | |
76 } else { | |
77 this.removeAttribute('aria-invalid'); | |
78 } | |
79 }, | |
80 | |
81 /** | |
82 * @return {Boolean} True if the validator `validator` exists. | |
83 */ | |
84 hasValidator: function() { | |
85 return this._validator != null; | |
86 }, | |
87 | |
88 /** | |
89 * @param {Object} values Passed to the validator's `validate()` function. | |
90 * @return {Boolean} True if `values` is valid. | |
91 */ | |
92 validate: function(values) { | |
93 var valid = this._validator && this._validator.validate(values); | |
94 this.invalid = !valid; | |
95 return valid; | |
96 } | |
97 | |
98 }; | |
99 | |
100 </script> | |
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