在多级下拉菜单中，如何防止子菜单重叠

Question

在我的多级下拉列表中，我在子菜单中遇到问题，如果我点击'产品'它很好用，但当我点击'产品2'时它会超出产品菜单，我希望产品菜单消失，产品2菜单只有可见菜单。 提前致谢

一个子菜单必须在其他子菜单打开前关闭

    <!DOCTYPE html>
<html>
<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.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>
<style>
.dropdown-submenu {
  position: relative;
}

.dropdown-submenu .dropdown-menu {
  top: 0;
  left: 100%;
  margin-top: -1px;
}
</style>
</head>
<body>

<div class="container">
  <h2>Multi-Level Dropdowns</h2>
  <p>In this example, we have created a .dropdown-submenu class for multi-level dropdowns (see style section above).</p>
  <p>Note that we have added jQuery to open the multi-level dropdown on click (see script section below).</p>                                        
  <div class="dropdown">
    <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Tutorials
    <span class="caret"></span></button>
    <ul class="dropdown-menu">
      <li><a tabindex="-1" href="#">HTML</a></li>
      <li><a tabindex="-1" href="#">CSS</a></li>
      <li class="dropdown-submenu">
        <a class="test" tabindex="-1" href="#">Products <span class="caret"></span></a>
        <ul class="dropdown-menu">
          <li><a tabindex="-1" href="#">2nd level dropdown</a></li>
          <li><a tabindex="-1" href="#">2nd level dropdown</a></li>
         </ul>
      </li>
      <li class="dropdown-submenu">
        <a class="test" tabindex="-1" href="#">Products 2<span class="caret"></span></a>
        <ul class="dropdown-menu">
          <li><a tabindex="-1" href="#">1nd level dropdown</a></li>
         </ul>
      </li>
    </ul>
  </div>
</div>

<script>
$(document).ready(function(){
  $('.dropdown-submenu a.test').on("click", function(e){
    $(this).next('ul').toggle();
    e.stopPropagation();
    e.preventDefault();
  });
});
</script>

</body>
</html>

Answer 1

试试这个$('.dropdown-submenu ul').hide();

  <!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css"> <script src="https://ajax.googleapis.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> <style> .dropdown-submenu { position: relative; } .dropdown-submenu .dropdown-menu { top: 0; left: 100%; margin-top: -1px; } </style> </head> <body> <div class="container"> <h2>Multi-Level Dropdowns</h2> <p>In this example, we have created a .dropdown-submenu class for multi-level dropdowns (see style section above).</p> <p>Note that we have added jQuery to open the multi-level dropdown on click (see script section below).</p> <div class="dropdown"> <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Tutorials <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a tabindex="-1" href="#">HTML</a></li> <li><a tabindex="-1" href="#">CSS</a></li> <li class="dropdown-submenu"> <a class="test" tabindex="-1" href="#">Products <span class="caret"></span></a> <ul class="dropdown-menu"> <li><a tabindex="-1" href="#">2nd level dropdown</a></li> <li><a tabindex="-1" href="#">2nd level dropdown</a></li> </ul> </li> <li class="dropdown-submenu"> <a class="test" tabindex="-1" href="#">Products 2<span class="caret"></span></a> <ul class="dropdown-menu"> <li><a tabindex="-1" href="#">1nd level dropdown</a></li> </ul> </li> </ul> </div> </div> <script> $(document).ready(function(){ $('.dropdown-submenu a.test').on("click", function(e){ $('.dropdown-submenu ul').hide(); $(this).next('ul').toggle(); e.stopPropagation(); e.preventDefault(); }); }); </script> </body> </html>

在多级下拉菜单中，如何防止子菜单重叠

问题描述

1 个解决方案

解决方案1
0 2019-04-26 13:46:07

在多级下拉菜单中，如何防止子菜单重叠

问题描述

1 个解决方案

解决方案1 0 2019-04-26 13:46:07

解决方案1
0 2019-04-26 13:46:07