Use this jsFiddle instead of Stack Snippet
$(".dropdown li a").dblclick(function(){
//alert('Long pressed');
$(this).parent().toggleClass('selected');
if ($('.dropdown li').hasClass('selected')) {
// alert('1 Item selected');
$(this).parent().parent().parent().parent().parent().parent().find('.header').find('.dropdown-title').addClass('hide');
$(this).parent().parent().parent().parent().parent().parent().find('.deleteli').removeClass('hide');
$(this).parent().parent().parent().parent().parent().parent().find('.deleteli').addClass('show');
}
else {
$(this).parent().parent().parent().parent().parent().parent().find('.header').find('span').removeClass('hide');
$('.delete').removeClass('show');
$('.delete').addClass('hide');
// alert('1 Item dis selected');
}
});
$('a#deletelibtn').click(function () {
// body...
// alert('deletelibtn clicked')
$(this).parent().parent().find('.selected').remove();
$(this).parent().find('.dropdown-title').removeClass('hide');
$(this).parent().find('.dropdown-title').addClass('show');
})/*Dropdown Messages*/
.messages-dropdown{
width: 300px;
}
.messages-dropdown .header{
padding: 15px;
border-bottom: 1px solid #ccc;
}
.messages-dropdown .header small{
float: right;
}
.messages-dropdown .header small a{
font-style: 9px;
margin-left: 5px;
}
.messages-dropdown .footer{
text-align: center;
border-top: 1px solid #ccc;
}
.messages-dropdown .footer a{
padding: 15px;
}
.messages-items{
list-style: none;
padding: 0;
padding-left: 0px;
margin: 0;
}
.messages-items .Mitem {
padding: 10px;
padding-left: 10px;
border-left: 3px solid transparent;
}
.messages-items .Mitem:hover {
background: #f0f0f0;
border-color: #3a3f51;
}
.messages-items .Mitem a {
display: inline-block;
width: 100%;
}
.messages-items .Mitem a:hover {
text-decoration: none;
background: #f0f0f0;
}
.messages-items .Mitem a b{
color: #444;
letter-spacing: 1px;
}
.messages-items .Mitem a small{
color: #999;
letter-spacing: 1px;
}
.messages-items .Mitem img{
float: left;
margin-right: 10px;
border-radius: 100% !important;
padding: 5px;
border: 1px solid #ccc;
width: 40px;
height: 40px;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<div>
<ul class="nav navbar-nav navbar-right">
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
<i class="icon icon-li-envelope message-bell"></i>
<span class="badge message-badge">4</span>
</a>
<ul class="dropdown-menu messages-dropdown">
<li class="header">
<span class="dropdown-title">
heading
</span>
<a class="#delete" id="deletelibtn">
delete
</a>
</li>
<div id="message">
<li>
<ul class="messages-items">
<li class="Mitem">
<a href="#MessageItem">
content
</a>
</li>
</ul>
</li>
<li>
<ul class="messages-items">
<li class="Mitem">
<a href="#MessageItem">
content
</a>
</li>
</ul>
</li>
<li>
<ul class="messages-items">
<li class="Mitem">
<a href="#MessageItem">
content
</a>
</li>
</ul>
</li>
<li>
<ul class="messages-items">
<li class="Mitem">
<a href="#MessageItem">
content
</a>
</li>
</ul>
</li>
</div>
</ul>
</li>
</ul>
</div>
<!--/.nav-collapse -->
</div>
</nav>deletelibtn选项已启用，我可以删除消息，但在删除消息后，deletelibtn按钮未隐藏，如果再次选择消息则删除选项未显示。
当显示deletelibtn选项时，应隐藏dropdown-title，同样在显示dropdown-title时，应隐藏deletelibtn按钮。
我希望我能完全解释我的需要。
答案 0 :(得分：0)
我改变了一些不会影响功能的小东西，但却是最佳实践＆＃39;。还有一些小的目标问题也是导致功能问题的原因。调试如此困难的原因是因为你的html是混乱的，你重复使用相同的单词使得很难遵循逻辑。这是纠正过的js。
$('.dropdown-menu li').on('click', function(event){
//The event won't be propagated to the document NODE and
// therefore events delegated to document won't be fired
event.stopPropagation();
});
$("ul.messages-items a").dblclick(function(){
$(this).closest('ul.messages-items').parent().addClass('selected');
var $container = $(this).closest('div.container-fluid')
if ($('li.dropdown').hasClass('open')) {
$container.find('.header').find('.dropdown-title').removeClass('show').addClass('hide');
$container.find('.deleteli').removeClass('hide').addClass('show');
}
else {
$container.find('.header').find('span').removeClass('hide').addClass('show');
$('.delete').removeClass('show').addClass('hide');
}
});
$('a#deletelibtn').click(function () {
var $this = $(this);
$('#message').find('li.selected').remove();
$this.parent().find('.dropdown-title').removeClass('hide').addClass('show');
$this.find('i.deleteli').removeClass('show').addClass('hide');
})
https://jsfiddle.net/xctgo71x/23/
您可以添加此关闭点击事件以重置下拉列表。
$(document).click(function(e){
//console.log(e);
if(true)
ResetDropdown();
});
function ResetDropdown(){
$('span.dropdown-title').removeClass('hide').addClass('show');
$('i.deleteli').removeClass('show').addClass('hide');
$('#message').find('li.selected').removeClass('selected');
}
它在jsfiddle上运行正常，但是根据你的实际代码，你可能需要调整一下。