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

我最近遇到了类似的问题,并尝试了不同的方法来解决它,删除数据属性data-toggle="下拉"和监听点击事件. stoppropagation()调用。

第二种方法看起来更可取。Bootstrap开发人员也使用这种方式。 在源文件中,我发现了下拉元素的初始化:

// 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, Dropdown.prototype.keydown)
.on('keydown.bs.dropdown.data-api', '.dropdown-menu', Dropdown.prototype.keydown)
}(jQuery);

这一行:

.on('click.bs.dropdown.data-api', '.dropdown form', function (e) { e.stopPropagation() })

建议您可以在容器中使用类.dropdown放置表单元素,以避免关闭下拉菜单。

其他回答

这也会有所帮助

$(document).on('click', 'someyourContainer .dropdown-menu', function (e) {
  e.stopPropagation();
});

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;
    }
});

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>

你需要添加“按住-点击”到“下拉菜单”类

[Bootstrap 4 Alpha 6][Rails] 对于rails开发人员来说,e.s stoppropagation()将导致link_to的data-method不等于get的不良行为,因为它默认将所有请求返回为get。

为了解决这个问题,我建议这个解决方案,它是通用的

$('.dropdown .dropdown-menu').on('click.bs.dropdown', function() {
  return $('.dropdown').one('hide.bs.dropdown', function() {
    return false;
  });
});

$('.dropdown .dropdown-menu').on('click.bs.dropdown', function() { return $('.dropdown').one('hide.bs.dropdown', function() { return false; }); }); <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous"> <script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script> <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>