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HTML Element Style - 如何創(chuàng)建嵌套列表懸停行...

我們想知道如何創(chuàng)建嵌套列表懸停行。... 

<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
nav>ul>li {
  clear: left;
  position: relative;
}

nav>ul>li ul {
  display: none;
}

nav>ul>li:hover ul {
  display: block;
}

nav>ul>li ul {
  position: absolute;
  left: 100px;
  top: 0;
}

nav>ul>li ul li {
  float: left;
  display: inline-block;
}
</style>
</head>
<body>
  <nav>
    <ul>
      <li>Parent 1
        <ul>
          <li>Child 1</li>
          <li>Child 2</li>
          <li>Child 3</li>
        </ul>
      </li>
      <li>Parent 2
        <ul>
          <li>Child 4</li>
          <li>Child 5</li>
          <li>Child 6</li>
        </ul>
      </li>
    </ul>
  </nav>
</body>
</html>