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dropdown.js 4.1KB

    /* ======================================================================== * Bootstrap: dropdown.js v3.1.1 * http://getbootstrap.com/javascript/#dropdowns * ======================================================================== * Copyright 2011-2014 Twitter, Inc. * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) * ======================================================================== */ +function ($) { 'use strict'; // DROPDOWN CLASS DEFINITION // ========================= var backdrop = '.dropdown-backdrop' var toggle = '[data-toggle=dropdown]' var Dropdown = function (element) { $(element).on('click.bs.dropdown', this.toggle) } Dropdown.prototype.toggle = function (e) { var $this = $(this) if ($this.is('.disabled, :disabled')) return var $parent = getParent($this) var isActive = $parent.hasClass('open') clearMenus() if (!isActive) { if ('ontouchstart' in document.documentElement && !$parent.closest('.navbar-nav').length) { // if mobile we use a backdrop because click events don't delegate $('<div class="dropdown-backdrop"/>').insertAfter($(this)).on('click', clearMenus) } var relatedTarget = { relatedTarget: this } $parent.trigger(e = $.Event('show.bs.dropdown', relatedTarget)) if (e.isDefaultPrevented()) return $parent .toggleClass('open') .trigger('shown.bs.dropdown', relatedTarget) $this.focus() } return false } Dropdown.prototype.keydown = function (e) { if (!/(38|40|27)/.test(e.keyCode)) return var $this = $(this) e.preventDefault() e.stopPropagation() if ($this.is('.disabled, :disabled')) return var $parent = getParent($this) var isActive = $parent.hasClass('open') if (!isActive || (isActive && e.keyCode == 27)) { if (e.which == 27) $parent.find(toggle).focus() return $this.click() } var desc = ' li:not(.divider):visible a' var $items = $parent.find('[role=menu]' + desc + ', [role=listbox]' + desc) if (!$items.length) return var index = $items.index($items.filter(':focus')) if (e.keyCode == 38 && index > 0) index-- // up if (e.keyCode == 40 && index < $items.length - 1) index++ // down if (!~index) index = 0 $items.eq(index).focus() } function clearMenus(e) { $(backdrop).remove() $(toggle).each(function () { var $parent = getParent($(this)) var relatedTarget = { relatedTarget: this } if (!$parent.hasClass('open')) return $parent.trigger(e = $.Event('hide.bs.dropdown', relatedTarget)) if (e.isDefaultPrevented()) return $parent.removeClass('open').trigger('hidden.bs.dropdown', relatedTarget) }) } function getParent($this) { var selector = $this.attr('data-target') if (!selector) { selector = $this.attr('href') selector = selector && /#[A-Za-z]/.test(selector) && selector.replace(/.*(?=#[^\s]*$)/, '') //strip for ie7 } var $parent = selector && $(selector) return $parent && $parent.length ? $parent : $this.parent() } // DROPDOWN PLUGIN DEFINITION // ========================== var old = $.fn.dropdown $.fn.dropdown = function (option) { return this.each(function () { var $this = $(this) var data = $this.data('bs.dropdown') if (!data) $this.data('bs.dropdown', (data = new Dropdown(this))) if (typeof option == 'string') data[option].call($this) }) } $.fn.dropdown.Constructor = Dropdown // DROPDOWN NO CONFLICT // ==================== $.fn.dropdown.noConflict = function () { $.fn.dropdown = old return this } // APPLY TO STANDARD DROPDOWN ELEMENTS // =================================== $(document) .on('click.bs.dropdown.data-api', clearMenus) .on('click.bs.dropdown.data-api', '.dropdown form', function (e) { e.stopPropagation() }) .on('click.bs.dropdown.data-api', toggle, Dropdown.prototype.toggle) .on('keydown.bs.dropdown.data-api', toggle + ', [role=menu], [role=listbox]', Dropdown.prototype.keydown) }(jQuery);