utofocus: {
        type: Boolean
      },

      /**
       * Bind this to the `<input is="iron-input">`'s `inputmode` property.
       */
      inputmode: {
        type: String
      },

      /**
       * Bind this to the `<input is="iron-input">`'s `minlength` property.
       */
      minlength: {
        type: Number
      },

      /**
       * The maximum length of the input value. Bind this to the `<input is="iron-input">`'s
       * `maxlength` property.
       */
      maxlength: {
        type: