button.js

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v4.0.0-alpha.4): button.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * --------------------------------------------------------------------------
 */

'use strict';

var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }

var Button = (function ($) {

  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */

  var NAME = 'button';
  var VERSION = '4.0.0-alpha.4';
  var DATA_KEY = 'bs.button';
  var EVENT_KEY = '.' + DATA_KEY;
  var DATA_API_KEY = '.data-api';
  var JQUERY_NO_CONFLICT = $.fn[NAME];

  var ClassName = {
    ACTIVE: 'active',
    BUTTON: 'btn',
    FOCUS: 'focus'
  };

  var Selector = {
    DATA_TOGGLE_CARROT: '[data-toggle^="button"]',
    DATA_TOGGLE: '[data-toggle="buttons"]',
    INPUT: 'input',
    ACTIVE: '.active',
    BUTTON: '.btn'
  };

  var Event = {
    CLICK_DATA_API: 'click' + EVENT_KEY + DATA_API_KEY,
    FOCUS_BLUR_DATA_API: 'focus' + EVENT_KEY + DATA_API_KEY + ' ' + ('blur' + EVENT_KEY + DATA_API_KEY)
  };

  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  var Button = (function () {
    function Button(element) {
      _classCallCheck(this, Button);

      this._element = element;
    }

    /**
     * ------------------------------------------------------------------------
     * Data Api implementation
     * ------------------------------------------------------------------------
     */

    // getters

    _createClass(Button, [{
      key: 'toggle',

      // public

      value: function toggle() {
        var triggerChangeEvent = true;
        var rootElement = $(this._element).closest(Selector.DATA_TOGGLE)[0];

        if (rootElement) {
          var input = $(this._element).find(Selector.INPUT)[0];

          if (input) {
            if (input.type === 'radio') {
              if (input.checked && $(this._element).hasClass(ClassName.ACTIVE)) {
                triggerChangeEvent = false;
              } else {
                var activeElement = $(rootElement).find(Selector.ACTIVE)[0];

                if (activeElement) {
                  $(activeElement).removeClass(ClassName.ACTIVE);
                }
              }
            }

            if (triggerChangeEvent) {
              input.checked = !$(this._element).hasClass(ClassName.ACTIVE);
              $(this._element).trigger('change');
            }

            input.focus();
          }
        } else {
          this._element.setAttribute('aria-pressed', !$(this._element).hasClass(ClassName.ACTIVE));
        }

        if (triggerChangeEvent) {
          $(this._element).toggleClass(ClassName.ACTIVE);
        }
      }
    }, {
      key: 'dispose',
      value: function dispose() {
        $.removeData(this._element, DATA_KEY);
        this._element = null;
      }

      // static

    }], [{
      key: '_jQueryInterface',
      value: function _jQueryInterface(config) {
        return this.each(function () {
          var data = $(this).data(DATA_KEY);

          if (!data) {
            data = new Button(this);
            $(this).data(DATA_KEY, data);
          }

          if (config === 'toggle') {
            data[config]();
          }
        });
      }
    }, {
      key: 'VERSION',
      get: function get() {
        return VERSION;
      }
    }]);

    return Button;
  })();

  $(document).on(Event.CLICK_DATA_API, Selector.DATA_TOGGLE_CARROT, function (event) {
    event.preventDefault();

    var button = event.target;

    if (!$(button).hasClass(ClassName.BUTTON)) {
      button = $(button).closest(Selector.BUTTON);
    }

    Button._jQueryInterface.call($(button), 'toggle');
  }).on(Event.FOCUS_BLUR_DATA_API, Selector.DATA_TOGGLE_CARROT, function (event) {
    var button = $(event.target).closest(Selector.BUTTON)[0];
    $(button).toggleClass(ClassName.FOCUS, /^focus(in)?$/.test(event.type));
  });

  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   */

  $.fn[NAME] = Button._jQueryInterface;
  $.fn[NAME].Constructor = Button;
  $.fn[NAME].noConflict = function () {
    $.fn[NAME] = JQUERY_NO_CONFLICT;
    return Button._jQueryInterface;
  };

  return Button;
})(jQuery);
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