carbon-components/es/globals/js/mixins/track-blur.js

Carbon Components is a component library for IBM Cloud

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/**
 * Copyright IBM Corp. 2016, 2018
 *
 * This source code is licensed under the Apache-2.0 license found in the
 * LICENSE file in the root directory of this source tree.
 */


import on from '../misc/on';
import handles from './handles';

function trackBlur(ToMix) {
  var TrackBlur =
  /*#__PURE__*/
  function (_ToMix) {
    _inherits(TrackBlur, _ToMix);
    /**
     * Mix-in class to add an handler for losing focus.
     * @extends Handles
     * @param {HTMLElement} element The element working as this component.
     * @param {Object} [options] The component options.
     */


    function TrackBlur(element, options) {
      var _this;

      _classCallCheck(this, TrackBlur);

      _this = _possibleConstructorReturn(this, _getPrototypeOf(TrackBlur).call(this, element, options));
      var hasFocusin = 'onfocusin' in window;
      var focusinEventName = hasFocusin ? 'focusin' : 'focus';

      _this.manage(on(_this.element.ownerDocument, focusinEventName, function (event) {
        if (!_this.element.contains(event.target)) {
          _this.handleBlur(event);
        }
      }, !hasFocusin));

      return _this;
    }
    /**
     * The method called when this component loses focus.
     * @abstract
     */


    _createClass(TrackBlur, [{
      key: "handleBlur",
      value: function handleBlur() {
        throw new Error('Components inheriting TrackBlur mix-in must implement handleBlur() method.');
      }
    }]);

    return TrackBlur;
  }(ToMix);

  return TrackBlur;
}

var exports = [handles, trackBlur];
export default exports;