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javascript - Jquery 没有关闭下拉菜单

问题描述

狗下拉菜单不会关闭点击宠物笼我正在使用 Bootstrap 导航栏构建多级（仅第二级）下拉菜单。我可以找到一个指南来构建多级下拉列表。

JSFiddle 链接

但是，下拉菜单不会在点击时关闭。可以通过单击关闭下拉菜单Document，我已在下面添加jquery。

$(document).click(function(){
    $('.dropdown-menu').removeClass('show');
});

下拉菜单关闭，但是，当单击其他nav-item打开的下拉菜单时，不会关闭。所以，JQuery我缺少基本的。基本上，当单击 other 时，类show不会从类中删除。所以，我想从.dropdown-menunav-itemshow.dropdown-menu

编辑：我正在寻找工作JS或Jquery代码，上面Jquery是从 staoverflow 复制的损坏代码。所以，寻找完整和干净的解决方案

$('.dropdown-menu a.dropdown-toggle').on('click', function(e) {
    if (!$(this).next().hasClass('show')) {
      $(this).parents('.dropdown-menu').first().find('.show').removeClass('show');
    }
    var $subMenu = $(this).next('.dropdown-menu');
    $subMenu.toggleClass('show');
  
    return false;
  });

$(document).click(function() {
    //   $('.dropdown-menu').toggleClass('show');
$('.dropdown-menu').removeClass('show');
});

$('.dropdown').click(function(event){
  event.stopPropagation();
});
.dropdown-submenu {
    position: relative;
  }
  
  .dropdown-submenu a::after {
    transform: rotate(-90deg);
    position: absolute;
    right: 6px;
    top: .8em;
  }
  
  .dropdown-submenu .dropdown-menu {
    top: 0;
    left: 100%;
    margin-left: .1rem;
    margin-right: .1rem;
  }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-giJF6kkoqNQ00vy+HMDP7azOuL0xtbfIcaT9wjKHr8RbDVddVHyTfAAsrekwKmP1" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js" integrity="sha384-ygbV9kiqUc6oa4msXn9868pTtWMgiQaeYH7/t7LECLbyPA2x65Kgf80OJFdroafW" crossorigin="anonymous"></script>
<nav class="navbar navbar-expand-md navbar-dark bg-primary py-1">
        <div class="container-fluid">
        <div class="flex-row d-flex">         
            <a class="navbar-brand" href="#">Brand</a>
        </div>    
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button> 
<div class="navbar-collapse collapse" id="navbarSupportedContent">
            <ul class="navbar-nav">
                <li class="nav-item dropdown">
                  <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                    Dogs
                  </a>
                  <ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                    <li><a class="dropdown-item" href="#">Bulldog</a></li>
                    <li><a class="dropdown-item" href="#">Al</a></li>
                    <li><a class="dropdown-item" href="#">Labrador</a></li>
                    <li class="dropdown-submenu"><a class="dropdown-item dropdown-toggle" href="#">Puppies</a>
                        <ul class="dropdown-menu">
                            <li><a class="dropdown-item" href="#">Husky</a></li>
                            <li><a class="dropdown-item" href="#">Husky B</a></li>
                            <li><a class="dropdown-item" href="#">Husky C</a></li>
                          </ul>
                    </li>
                    <li class="dropdown-submenu"><a class="dropdown-item dropdown-toggle" href="#">Pet Products</a>
                        <ul class="dropdown-menu">
                            <li><a class="dropdown-item" href="#">Cat</a></li>
                            <li><a class="dropdown-item" href="#">Dogs</a></li>
                            <li><a class="dropdown-item" href="#">Reptile</a></li>
                            <li><a class="dropdown-item" href="#">Amphibian</a></li>
                          </ul>
                    </li>
                  </ul>
                </li>
                  <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                      Pet Cages
                    </a>
                    <ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                      <li><a class="dropdown-item" href="#">Cat</a></li>
                      <li><a class="dropdown-item" href="#">Dogs</a></li>
                      <li><a class="dropdown-item" href="#">Reptile</a></li>
                    </ul>
                  </li>
                  <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                      Pet Guides
                    </a>
                    <ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                      <li><a class="dropdown-item" href="#">Labrador</a></li>
                      <li><a class="dropdown-item" href="#">Cat</a></li>
                      <li><a class="dropdown-item" href="#">Lizard</a></li>
                    </ul>
                  </li>
                  <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                      ML & AI
                    </a>
                    <ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                      <li><a class="dropdown-item" href="#">Pet CBD</a></li>                      
                    </ul>
                  </li>
                <!-- <form class="d-flex"> -->
                    <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
                    <!-- <button class="btn btn-outline-success" type="submit">Search</button> -->
                  <!-- </form> -->
              </ul>
        </div>
        </div>
        </nav>

标签： javascripthtmljquerycsstwitter-bootstrap

解决方案

对于持久性打开的DROPWON的主要问题，您可以通过侦听nav-link事件来解决该问题show.bs.dropdown，然后从.dropdown包装中删除 show 类.dropdown-submenu

如下：

$('.nav-link').on('show.bs.dropdown', function(e) {
  $(".dropdown-submenu .dropdown-menu").removeClass("show");
});

请参阅下面的工作片段：（也可以全屏尝试）

为了测试，我从片段中删除了一些菜单：

$('.dropdown-menu a.dropdown-toggle').on('click', function(e) {
  if (!$(this).next().hasClass('show')) {
    $(this).parents('.dropdown-menu').first().find('.show').removeClass('show');
  }
  var $subMenu = $(this).next('.dropdown-menu');
  $subMenu.toggleClass('show');

  return false;
});


$('.nav-link').on('show.bs.dropdown', function(e) {
  $(".dropdown-submenu .dropdown-menu").removeClass("show");
});

$(document).on("click", ".nav-link", function(e){
  console.log("clicl nav");
})

$('.dropdown').click(function(event) {
  console.log("click");
  event.stopPropagation();
});
.dropdown-submenu {
  position: relative;
}

.dropdown-submenu a::after {
  transform: rotate(-90deg);
  position: absolute;
  right: 6px;
  top: .8em;
}

.dropdown-submenu .dropdown-menu {
  top: 0;
  left: 100%;
  margin-left: .1rem;
  margin-right: .1rem;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/js/bootstrap.bundle.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta1/dist/css/bootstrap.min.css" rel="stylesheet" />
<nav class="navbar navbar-expand-md navbar-dark bg-primary py-1">
  <div class="container-fluid">
    <div class="flex-row d-flex">
      <a class="navbar-brand" href="#">Brand</a>
    </div>
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>
    <div class="navbar-collapse collapse" id="navbarSupportedContent">
      <ul class="navbar-nav">
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                    Dogs
                  </a>
          <ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
            <li><a class="dropdown-item" href="#">Bulldog</a></li>
            <li><a class="dropdown-item" href="#">Al</a></li>
            <li><a class="dropdown-item" href="#">Labrador</a></li>
            <li class="dropdown-submenu"><a class="dropdown-item dropdown-toggle" href="#">Puppies</a>
              <ul class="dropdown-menu">
                <li><a class="dropdown-item" href="#">Husky</a></li>
                <li><a class="dropdown-item" href="#">Husky B</a></li>
                <li><a class="dropdown-item" href="#">Husky C</a></li>
              </ul>
            </li>
            <li class="dropdown-submenu"><a class="dropdown-item dropdown-toggle" href="#">Pet Products</a>
              <ul class="dropdown-menu">
                <li><a class="dropdown-item" href="#">Cat</a></li>
                <li><a class="dropdown-item" href="#">Dogs</a></li>
                <li><a class="dropdown-item" href="#">Reptile</a></li>
                <li><a class="dropdown-item" href="#">Amphibian</a></li>
              </ul>
            </li>
          </ul>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                      Pet Cages
                    </a>
          <ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
            <li><a class="dropdown-item" href="#">Cat</a></li>
            <li><a class="dropdown-item" href="#">Dogs</a></li>
            <li><a class="dropdown-item" href="#">Reptile</a></li>
          </ul>
        </li>
        <!-- <button class="btn btn-outline-success" type="submit">Search</button> -->
        <!-- </form> -->
      </ul>
    </div>
  </div>
</nav>

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