Question

我是javascript和CSS内容的新手。我正在尝试从this W3Schools example添加菜单。该代码工作正常。但是我想在菜单代码中添加另一个级别，以使其成为多级别菜单（2个级别）。我怎样才能做到这一点？我曾经尝试过，但是无法正常工作。希望这里的专家能提供一些建议。非常感谢您的建议。提前致谢。下面是更改的代码。

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<style>
body {
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
}

.navbar {
  overflow: hidden;
  background-color: #333; 
}

.navbar a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.subnav {
  float: left;
  overflow: hidden;
}

.subnav .subnavbtn {
  font-size: 16px;  
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.navbar a:hover, .subnav:hover .subnavbtn {
  background-color: red;
}

.subnav-content {
  display: none;
  position: absolute;
  left: 0;
  background-color: red;
  width: 100%;
  z-index: 1;
}

.subnav-content a {
  float: left;
  color: white;
  text-decoration: none;
}

.subnav-content a:hover {
  background-color: #eee;
  color: black;
}

.subnav:hover .subnav-content {
  display: block;
}

.subnav1 {
  float: left;
  overflow: hidden;
}

.subnav1 .subnavbtn1 {
  font-size: 16px;  
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}
.subnav-content1 {
  display: none;
  position: absolute;
  left: 0;
  background-color: blue;
  width: 100%;
  z-index: 1;
}

.subnav-content1 a {
  float: left;
  color: white;
  text-decoration: none;
}

.subnav-content1 a:hover {
  background-color: yellow;
  color: black;
}
</style>
</head>
<body>

<div class="navbar">
  <a href="#home">Home</a>
  <div class="subnav">
    <button class="subnavbtn">About <i class="fa fa-caret-down"></i></button>
    <div class="subnav-content">
      <a href="#company">Company</a>
      <a href="#team">Team</a>      
      <div class="subnav1">
        <button class="subnavbtn1">Career <i class="fa fa-caret-down"></i></button>
        <div class="subnav-content1">
          <a href="#company">Career 1</a>
          <a href="#team" >Career 2</a>
          <a href="#careers">Careers 3</a>
        </div>      
     </div>       
    </div>
  </div> 
  <div class="subnav">
    <button class="subnavbtn">Services <i class="fa fa-caret-down"></i></button>
    <div class="subnav-content">
      <a href="#bring">Bring</a>
      <a href="#deliver">Deliver</a>
      <a href="#package">Package</a>
      <a href="#express">Express</a>
    </div>
  </div> 
  <div class="subnav">
    <button class="subnavbtn">Partners <i class="fa fa-caret-down"></i></button>
    <div class="subnav-content">
      <a href="#link1">Link 1</a>
      <a href="#link2">Link 2</a>
      <a href="#link3">Link 3</a>
      <a href="#link4">Link 4</a>
    </div>
  </div>
  <a href="#contact">Contact</a>
</div>

<div style="padding:0 16px">
  <h3>Subnav/dropdown menu inside a Navigation Bar</h3>
  <p>Hover over the "about", "services" or "partners" link to see the sub navigation menu.</p>
</div>

</body>
</html>

Answer 1

.subnav:hover .subnav-content, .subnav1:hover .subnav-content1 {
  display: block;
}

您需要为subnav1和subnav-content1类添加CSS

https://jsfiddle.net/buzz868/1txq8bo6/1/

多级下拉菜单

1 个答案: