Question

我有一个要求，我需要在移动视图上有一个导航栏，该导航栏显示一些链接。这些链接是父页面，单击时将需要在它们下面显示子页面。显示子菜单时，我需要隐藏父菜单。在单击后退按钮时，需要显示父菜单链接。谁能给我一些实施方法的想法。

我已经在UL下将页面创建为LI，并在LI下添加了新的UL以创建子页面列表。

<nav>
  <ul>
    <li>
      <a>A</a>
      <ul>
        <li>
          <a>aa</a>
          <a>ab</a>
          <a>ac</a>
        </li>
       </ul>
      </li>
     </ul>
</nav>

所以我的要求是单击A时显示aa，ab，ac，并隐藏显示A的菜单，而菜单仅显示aa，ab和ac。单击后退按钮时，我需要显示带有A的菜单，并隐藏带有aa，ab和ac的菜单

Answer 1

<!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;
}
</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>
      <a href="#careers">Careers</a>
    </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>

需要显示子菜单并隐藏菜单项

1 个答案: