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| 1 | |
| 2 | |
| 3 /** | |
| 4 * Use `Polymer.IronValidatableBehavior` to implement an element that validate
s user input. | |
| 5 * | |
| 6 * ### Accessiblity | |
| 7 * | |
| 8 * Changing the `invalid` property, either manually or by calling `validate()`
will update the | |
| 9 * `aria-invalid` attribute. | |
| 10 * | |
| 11 * @demo demo/index.html | |
| 12 * @polymerBehavior | |
| 13 */ | |
| 14 Polymer.IronValidatableBehavior = { | |
| 15 | |
| 16 properties: { | |
| 17 | |
| 18 /** | |
| 19 * Namespace for this validator. | |
| 20 */ | |
| 21 validatorType: { | |
| 22 type: String, | |
| 23 value: 'validator' | |
| 24 }, | |
| 25 | |
| 26 /** | |
| 27 * Name of the validator to use. | |
| 28 */ | |
| 29 validator: { | |
| 30 type: String | |
| 31 }, | |
| 32 | |
| 33 /** | |
| 34 * True if the last call to `validate` is invalid. | |
| 35 */ | |
| 36 invalid: { | |
| 37 reflectToAttribute: true, | |
| 38 type: Boolean, | |
| 39 value: false | |
| 40 }, | |
| 41 | |
| 42 _validatorMeta: { | |
| 43 type: Object | |
| 44 } | |
| 45 | |
| 46 }, | |
| 47 | |
| 48 observers: [ | |
| 49 '_invalidChanged(invalid)' | |
| 50 ], | |
| 51 | |
| 52 get _validator() { | |
| 53 return this._validatorMeta && this._validatorMeta.byKey(this.validator); | |
| 54 }, | |
| 55 | |
| 56 ready: function() { | |
| 57 this._validatorMeta = new Polymer.IronMeta({type: this.validatorType}); | |
| 58 }, | |
| 59 | |
| 60 _invalidChanged: function() { | |
| 61 if (this.invalid) { | |
| 62 this.setAttribute('aria-invalid', 'true'); | |
| 63 } else { | |
| 64 this.removeAttribute('aria-invalid'); | |
| 65 } | |
| 66 }, | |
| 67 | |
| 68 /** | |
| 69 * @return {Boolean} True if the validator `validator` exists. | |
| 70 */ | |
| 71 hasValidator: function() { | |
| 72 return this._validator != null; | |
| 73 }, | |
| 74 | |
| 75 /** | |
| 76 * @param {Object} values Passed to the validator's `validate()` function. | |
| 77 * @return {Boolean} True if `values` is valid. | |
| 78 */ | |
| 79 validate: function(values) { | |
| 80 var valid = this._validator && this._validator.validate(values); | |
| 81 this.invalid = !valid; | |
| 82 return valid; | |
| 83 } | |
| 84 | |
| 85 }; | |
| 86 | |
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