third_party/polymer/v1_0/components-chromium/iron-validatable-behavior/iron-validatable-behavior-extracted.js

   1
   2
   3   /**
   4    * Use `Polymer.IronValidatableBehavior` to implement an element that validates 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         notify: true,
  38         reflectToAttribute: true,
  39         type: Boolean,
  40         value: false
  41       },
  42
  43       _validatorMeta: {
  44         type: Object
  45       }
  46
  47     },
  48
  49     observers: [
  50       '_invalidChanged(invalid)'
  51     ],
  52
  53     get _validator() {
  54       return this._validatorMeta && this._validatorMeta.byKey(this.validator);
  55     },
  56
  57     ready: function() {
  58       this._validatorMeta = new Polymer.IronMeta({type: this.validatorType});
  59     },
  60
  61     _invalidChanged: function() {
  62       if (this.invalid) {
  63         this.setAttribute('aria-invalid', 'true');
  64       } else {
  65         this.removeAttribute('aria-invalid');
  66       }
  67     },
  68
  69     /**
  70      * @return {boolean} True if the validator `validator` exists.
  71      */
  72     hasValidator: function() {
  73       return this._validator != null;
  74     },
  75
  76     /**
  77      * @param {Object} values Passed to the validator's `validate()` function.
  78      * @return {boolean} True if `values` is valid.
  79      */
  80     validate: function(values) {
  81       var valid = true;
  82       if (this.hasValidator()) {
  83         valid = this._validator.validate(values);
  84       }
  85
  86       this.invalid = !valid;
  87       return valid;
  88     }
  89
  90   };
  91