[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>

我是这样做的:

$(element).on({
    'mouseenter': function(event) {
        $(event.currentTarget).data('mouseover', true);
    },
    'mouseleave': function(event) {
        $(event.currentTarget).data('mouseover', false);
    },
    'hide.bs.dropdown': function (event) {
        return !$(event.currentTarget).data('mouseover');
    }
});

我只是添加了点击事件如下不关闭下拉菜单。

 <div class="dropdown-menu dropdown-menu-right" onclick="event.stopPropagation()" aria-labelledby="triggerId">

引导5

如果有人通过谷歌来到这里，想要一个像我一样的Bootstrap 5版本，它是通过添加data-b -auto-close="outside"而内置的。注意，该选项是autoClose，但当作为数据属性传递时，驼峰字体被删除并由破折号分隔。

我在下拉菜单中添加了一个折叠小部件，并将data-b -auto-close="outside"添加到父data-b -toggle="dropdown"触发器，使下拉菜单在折叠菜单切换时保持打开状态。

查看官方引导文档:https://getbootstrap.com/docs/5.1/components/dropdowns/#options 这个代码依赖于示例代码(不是我的笔):https://codepen.io/SitePoint/pen/BaReWGe

我知道这个问题是专门针对jQuery的，但是对于任何使用AngularJS的人来说，你可以创建一个指令来处理这个问题:

angular.module('app').directive('dropdownPreventClose', function() {
    return {
        restrict: 'A',
        link: function(scope, element, attrs) {
          element.on('click', function(e) {
            e.stopPropagation(); //prevent the default behavior of closing the dropdown-menu
          });
        }
    };
});

然后，只需在触发菜单关闭的元素上添加属性下拉-防止-关闭，它就应该会阻止关闭。对我来说，它是一个自动关闭菜单的选择元素:

<div class="dropdown-menu">
  <select dropdown-prevent-close name="myInput" id="myInput" ng-model="myModel">
    <option value="">Select Me</option>
  </select>
</div>

比如Bootstrap 4 Alpha有这个菜单事件。为什么不用呢?

// PREVENT INSIDE MEGA DROPDOWN
$('.dropdown-menu').on("click.bs.dropdown", function (e) {
    e.stopPropagation();
    e.preventDefault();                
});