Javascript 重新打开或关闭后重置下拉菜单详细信息_Javascript_Jquery_Html_Drop Down Menu

Javascript 重新打开或关闭后重置下拉菜单详细信息

javascript jquery html drop-down-menu

Javascript 重新打开或关闭后重置下拉菜单详细信息,javascript,jquery,html,drop-down-menu,Javascript,Jquery,Html,Drop Down Menu,代码： <head> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css"> <script src="https:

代码：

<head>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
    <script
    src="https://code.jquery.com/ui/1.9.2/jquery-ui.min.js"
    integrity="sha256-eEa1kEtgK9ZL6h60VXwDsJ2rxYCwfxi40VZ9E0XwoEA="
    crossorigin="anonymous"></script>
</head>
<body>

<div class="dropdown bigdiv">
  <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Dropdown Example
    <span class="caret"></span></button>
  <ul class="dropdown-menu bigul">
    <li>
        <a href="#" id="open_input">open_input</a>
    </li>

    <ul class="list-group test">
    </ul>
  </ul>
</div>

</body>
<script>
    $(document).ready(function () {
        var availableTags = [
            "ActionScript",
            "AppleScript",
            "Asp",
            "BASIC",
            "C",
            "C++",
            "Clojure",
            "COBOL",
            "ColdFusion",
            "Erlang",
            "Fortran",
        ];

        var ul_text = '    <li class="ui-widget">\n' +
            '<form role="form" style="">\n' +
            '                <div class="input-group input-group-sm" style="">\n' +
            '                  <input type="text" class="form-control" id="tags" placeholder="Enter email">\n' +
            '                </div>\n' +
            '              </form>\n' +
            '    </li>'

        $('#open_input').click(function (e) {
            $('.bigul').append(ul_text)

            $('#tags').autocomplete({
                    search: function(event, ui) {
                        $('.test').empty();
                    },
                    source: availableTags,
                    messages: {
                        noResults: '',
                        results: function() {}
                    }
                }).data('autocomplete')._renderItem = function(ul, item) {
                    return $('<li class="list-group-item"></li>')
                        .data('item.autocomplete', item)
                        .append(item.value)
                        .appendTo($('.test'));
                    };
            e.stopPropagation();
        });
    });
</script>

问题：我要求在下一个下拉菜单重新打开时，无法看到下拉菜单上任何更改的内容。我想使下拉菜单的初始状态保持不变

我该怎么做？

编辑：我意识到我们不能使用

.focusout

，因为单击下拉菜单的子元素（例如输入文本）将清除其

li.ui小部件的下拉菜单
解决方案是使用引导下拉关闭事件hide.bs.dropdown
来检测是否已关闭菜单
$('.bigdiv').on('hide.bs.dropdown', function () {
    $('.bigul .ui-widget').remove()
    console.log('removing')
})

小提琴：
这个想法来自：
如果您使用的是Bootstrap v2.3.2，则在同一链接中会显示使用单击.dropdown.data api
事件
$('.bigdiv').on('hide.bs.dropdown', function () {
    $('.bigul .ui-widget').remove()
    console.log('removing')
})