Bootstrap/js/bootstrap-dropdown.js

/* ============================================================
 * bootstrap-dropdown.js v2.0.0
 * http://twitter.github.com/bootstrap/javascript.html#dropdowns
 * ============================================================
 * Copyright 2012 Twitter, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============================================================ */


!function( $ ){

  "use strict"

 /* DROPDOWN CLASS DEFINITION
  * ========================= */

  var toggle = '[data-toggle="dropdown"]'
    , Dropdown = function ( element ) {
        $(element).bind('click', this.toggle)
      }

  Dropdown.prototype = {

    constructor: Dropdown

  , toggle: function ( e ) {
      var $this = $(this)
        , selector = $this.attr('data-target') || $this.attr('href')
        , $parent = $(selector)
        , isActive

      $parent.length || ($parent = $this.parent())
      isActive = $parent.hasClass('open')

      clearMenus()

      !isActive && $parent.toggleClass('open')

      return false
    }

  }

  function clearMenus() {
    $(toggle).parent().removeClass('open')
  }


  /* DROPDOWN PLUGIN DEFINITION
   * ========================== */

  $.fn.dropdown = function ( option ) {
    return this.each(function () {
      var $this = $(this)
        , data = $this.data('dropdown')
      if (!data) $this.data('dropdown', (data = new Dropdown(this)))
      if (typeof option == 'string') data[option].call($this)
    })
  }

  $.fn.dropdown.Constructor = Dropdown


  /* APPLY TO STANDARD DROPDOWN ELEMENTS
   * =================================== */

  $(function () {
    $(window).on('click.dropdown.data-api', clearMenus)
    $('body').on('click.dropdown.data-api', toggle, Dropdown.prototype.toggle)
  })

}( window.jQuery )