JAVASCRIPT   45
bootstrap dropdown
Guest on 3rd May 2022 02:34:28 AM


  1. /* ============================================================
  2.  * bootstrap-dropdown.js v2.2.2
  3.  * http://twitter.github.com/bootstrap/javascript.html#dropdowns
  4.  * ============================================================
  5.  * Copyright  Twitter, Inc.
  6.  *
  7.  * Licensed under the Apache License, Version 2.0 (the "License");
  8.  * you may not use this file except in compliance with the License.
  9.  * You may obtain a copy of the License at
  10.  *
  11.  * http://www.apache.org/licenses/LICENSE-2.0
  12.  *
  13.  * Unless required by applicable law or agreed to in writing, software
  14.  * distributed under the License is distributed on an "AS IS" BASIS,
  15.  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16.  * See the License for the specific language governing permissions and
  17.  * limitations under the License.
  18.  * ============================================================ */
  19.  
  20.  
  21. !function ($) {
  22.  
  23.   "use strict"; // jshint ;_;
  24.  
  25.  
  26.  /* DROPDOWN CLASS DEFINITION
  27.   * ========================= */
  28.  
  29.   var toggle = '[data-toggle=dropdown]'
  30.     , Dropdown = function (element) {
  31.         var $el = $(element).on('click.dropdown.data-api', this.toggle)
  32.         $('html').on('click.dropdown.data-api', function () {
  33.           $el.parent().removeClass('open')
  34.         })
  35.       }
  36.  
  37.   Dropdown.prototype = {
  38.  
  39.     constructor: Dropdown
  40.  
  41.   , toggle: function (e) {
  42.       var $this = $(this)
  43.         , $parent
  44.         , isActive
  45.  
  46.       if ($this.is('.disabled, :disabled')) return
  47.  
  48.       $parent = getParent($this)
  49.  
  50.       isActive = $parent.hasClass('open')
  51.  
  52.       clearMenus()
  53.  
  54.       if (!isActive) {
  55.         $parent.toggleClass('open')
  56.       }
  57.  
  58.       $this.focus()
  59.  
  60.       return false
  61.     }
  62.  
  63.   , keydown: function (e) {
  64.       var $this
  65.         , $items
  66.         , $active
  67.         , $parent
  68.         , isActive
  69.         , index
  70.  
  71.       if (!/(38|40|27)/.test(e.keyCode)) return
  72.  
  73.       $this = $(this)
  74.  
  75.       e.preventDefault()
  76.       e.stopPropagation()
  77.  
  78.       if ($this.is('.disabled, :disabled')) return
  79.  
  80.       $parent = getParent($this)
  81.  
  82.       isActive = $parent.hasClass('open')
  83.  
  84.       if (!isActive || (isActive && e.keyCode == 27)) return $this.click()
  85.  
  86.       $items = $('[role=menu] li:not(.divider):visible a', $parent)
  87.  
  88.       if (!$items.length) return
  89.  
  90.       index = $items.index($items.filter(':focus'))
  91.  
  92.       if (e.keyCode == 38 && index > 0) index--                                        // up
  93.       if (e.keyCode == 40 && index < $items.length - 1) index++                        // down
  94.       if (!~index) index = 0
  95.  
  96.       $items
  97.         .eq(index)
  98.         .focus()
  99.     }
  100.  
  101.   }
  102.  
  103.   function clearMenus() {
  104.     $(toggle).each(function () {
  105.       getParent($(this)).removeClass('open')
  106.     })
  107.   }
  108.  
  109.   function getParent($this) {
  110.     var selector = $this.attr('data-target')
  111.       , $parent
  112.  
  113.     if (!selector) {
  114.       selector = $this.attr('href')
  115.       selector = selector && /#/.test(selector) && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7
  116.     }
  117.  
  118.     $parent = $(selector)
  119.     $parent.length || ($parent = $this.parent())
  120.  
  121.     return $parent
  122.   }
  123.  
  124.  
  125.   /* DROPDOWN PLUGIN DEFINITION
  126.    * ========================== */
  127.  
  128.   var old = $.fn.dropdown
  129.  
  130.   $.fn.dropdown = function (option) {
  131.     return this.each(function () {
  132.       var $this = $(this)
  133.         , data = $this.data('dropdown')
  134.       if (!data) $this.data('dropdown', (data = new Dropdown(this)))
  135.       if (typeof option == 'string') data[option].call($this)
  136.     })
  137.   }
  138.  
  139.   $.fn.dropdown.Constructor = Dropdown
  140.  
  141.  
  142.  /* DROPDOWN NO CONFLICT
  143.   * ==================== */
  144.  
  145.   $.fn.dropdown.noConflict = function () {
  146.     $.fn.dropdown = old
  147.     return this
  148.   }
  149.  
  150.  
  151.   /* APPLY TO STANDARD DROPDOWN ELEMENTS
  152.    * =================================== */
  153.  
  154.   $(document)
  155.     .on('click.dropdown.data-api touchstart.dropdown.data-api', clearMenus)
  156.     .on('click.dropdown touchstart.dropdown.data-api', '.dropdown form', function (e) { e.stopPropagation() })
  157.     .on('touchstart.dropdown.data-api', '.dropdown-menu', function (e) { e.stopPropagation() })
  158.     .on('click.dropdown.data-api touchstart.dropdown.data-api'  , toggle, Dropdown.prototype.toggle)
  159.     .on('keydown.dropdown.data-api touchstart.dropdown.data-api', toggle + ', [role=menu]' , Dropdown.prototype.keydown)
  160.  
  161. }(window.jQuery);
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