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<link rel=“import” href=“../polymer/polymer.html”>

<script>

/**
 * Use `Polymer.PaperInputAddonBehavior` to implement an add-on for `<paper-input-container>`. A
 * add-on appears below the input, and may display information based on the input value and
 * validity such as a character counter or an error message.
 * @polymerBehavior
 */
Polymer.PaperInputAddonBehavior = {

  hostAttributes: {
    'add-on': ''
  },

  attached: function() {
    this.fire('addon-attached');
  },

  /**
   * The function called by `<paper-input-container>` when the input value or validity changes.
   * @param {{
   *   inputElement: (Element|undefined),
   *   value: (string|undefined),
   *   invalid: boolean
   * }} state -
   *     inputElement: The input element.
   *     value: The input value.
   *     invalid: True if the input value is invalid.
   */
  update: function(state) {
  }

};

</script>