避免下拉菜单关闭点击里面

我有一个推特引导下拉菜单。所有Twitter Bootstrap用户都知道，下拉菜单在点击时关闭(甚至在里面点击)。

为了避免这种情况，我可以很容易地在下拉菜单上附加一个单击事件处理程序，并简单地添加著名的event. stoppropagation()。

<ul class="nav navbar-nav">
  <li class="dropdown mega-dropdown">
    <a href="javascript:;" class="dropdown-toggle" data-toggle="dropdown">
      <i class="fa fa-list-alt"></i> Menu item 1
      <span class="fa fa-chevron-down pull-right"></span>
    </a>
    <ul class="dropdown-menu mega-dropdown-menu">
      <li>
        <div id="carousel" class="carousel slide" data-ride="carousel">
          <ol class="carousel-indicators">
            <li data-slide-to="0" data-target="#carousel"></li>
            <li class="active" data-slide-to="1" data-target="#carousel"></li>
          </ol>
          <div class="carousel-inner">
            <div class="item">
              <img alt="" class="img-rounded" src="img1.jpg">
            </div>
            <div class="item active">
              <img alt="" class="img-rounded" src="img2.jpg">
            </div>
          </div>
          <a data-slide="prev" role="button" href="#carousel" 
             class="left carousel-control">
            <span class="glyphicon glyphicon-chevron-left"></span>
          </a>
          <a data-slide="next" role="button" href="#carousel" 
             class="right carousel-control">
            <span class="glyphicon glyphicon-chevron-right"></span>
          </a>
        </div>
      </li>
    </ul>
  </li>
</ul>

这看起来很简单，也是一种非常常见的行为，然而，由于carousel控件(以及carousel指示器)事件处理程序被委托给文档对象，这些元素上的单击事件(prev/next控件，…)将被“忽略”。

$('ul.dropdown-menu.mega-dropdown-menu').on('click', function(event){
    // The event won't be propagated up to the document NODE and 
    // therefore delegated events won't be fired
    event.stopPropagation();
});

依赖于Twitter Bootstrap下拉隐藏/隐藏事件不是一个解决方案，原因如下:

为两个事件处理程序提供的事件对象没有提供对所单击元素的引用我无法控制下拉菜单内容，因此添加标志类或属性是不可能的

这个小提琴是正常的行为，这个小提琴是添加了event.stopPropagation()。

更新

谢谢罗曼的回答。我也找到了一个答案，你可以在下面找到。

当前回答

对我来说，最简单的解决方案是:

将keep-open类添加到不会导致下拉关闭的元素中下面这段代码完成剩下的工作:

$('.dropdown').on('click', function(e) {
    var target = $(e.target);
    var dropdown = target.closest('.dropdown');
    return !dropdown.hasClass('open') || !target.hasClass('keep-open');
});

2016-07-14 11:25:25

其他回答

Bootstrap提供以下功能:

                 | This event is fired immediately when the hide instance method 
hide.bs.dropdown | has been called. The toggling anchor element is available as the 
                 | relatedTarget property of the event.

因此，实现这个函数应该能够禁止关闭下拉列表。

$('#myDropdown').on('hide.bs.dropdown', function (e) {
    var target = $(e.clickEvent.target);
    if(target.hasClass("keepopen") || target.parents(".keepopen").length){
        return false; // returning false should stop the dropdown from hiding.
    }else{
        return true;
    }
});

2014-08-01 22:06:32

引导4

$('.dropdown-menu[data-handledropdownclose="true"]').on("click.bs.dropdown", function (e) {
    if ($(this).parent().hasClass("show")) {
        var target = $(e.target);

        if (!(target.hasClass("CloseDropDown") || target.parents(".CloseDropDown").length)) {
            e.stopPropagation();
        }
    }
});

<div class="dropdown">
    <button type="button" class="btn-no-border dropdown-toggle" data-toggle="dropdown">
        <img src="~/Content/CSS/CssImages/Icons/usr_icon.png" alt="" title="language" class="float-right" />
    </button>

    <div class="dropdown-menu profile-menu-logout" data-handledropdownclose="true">
        <div class="prof-name">
            <i class="fa fa-user"></i> Hello World
        </div>

        <hr />

        <div>
            <a href="/Test/TestAction" class="CloseDropDown">
                <i class="fa fa-briefcase"></i>
                <span>Test Action</span>
            </a>
        </div>

        <div>
            <nav>
                <ul class="nav-menu-prof padding-0">
                    <li class="menu-has-children">
                        <a href="#">
                            <span class="cyan-text-color">
                                Test 2
                            </span>
                        </a>

                        <ul id="ulList" class="padding-0 pad-left-25">
                            <li>
                                <a href="/Test/Test2" class="action currentmenu"> Test 1 </a>
                                <a href="/Test/Test2" class="action CloseDropDown"> Test 2 </a>
                            </li>
                        </ul>
                    </li>
                </ul>
            </nav>
        </div>

        <div>
            <a href="/Account/Logout" class="cyan-text-color CloseDropDown">
                <i class="fa fa-power-off"></i>
                <span>Logout</span>
            </a>
        </div>
    </div>
</div>

2020-04-30 04:40:19

你也可以使用表单标签。例子:

<div class="dropdown-menu">
    <form>
        Anything inside this wont close the dropdown!
        <button class="btn btn-primary" type="button" value="Click me!"/>
    </form>
    <div class="dropdown-divider"></div>
    <a class="dropdown-item" href="#">Clik this and the dropdown will be closed</a>
    <a class="dropdown-item" href="#">This too</a>
</div>

来源:https://getbootstrap.com/docs/5.0/components/dropdowns/形式

2021-01-22 06:18:21

$(function() {
var closeble = false;
$('body').on('click', function (e) {
    if (!$(event.target).is("a.dropdown-toggle")) {
        closeble = false;
    }

});
$('.dropdown').on({
    "click": function(event) {
        if ($(event.target).closest('.dropdown-toggle').length) {
            closeble = true;
        } else {
            closeble = false;
        }
    },
    "hide.bs.dropdown": function() {
        return closeble;
    }
});

});

2017-09-14 23:05:56

您可以通过下面的代码来解决这个问题。

$(document).on('click.bs.dropdown.data-api', '.keep_it_open', function (e) { e.stopPropagation(); }); <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css" rel="stylesheet"/> <meta name="viewport" content="width=device-width, initial-scale=1"> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css"> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script> <div class="dropdown keep_it_open"> <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Dropdown Example <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="#">HTML</a></li> <li><a href="#">CSS</a></li> <li><a href="#">JavaScript</a></li> </ul> </div>

2019-07-17 12:46:24

避免下拉菜单关闭点击里面

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