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JS code sharing to implement simple label click switching function

小云云Original: 2018-02-07 11:51:541250browse

This article mainly introduces the simple label click switching function implemented by JS, involving javascript event response, page element traversal, attribute dynamic transformation and other related operation skills. Friends in need can refer to it, I hope it can help everyone

The specific code is as follows:

<!DOCTYPE html>
<html>
<head lang="en">
  <meta charset="UTF-8">
  <title>www.php.cn</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }
    ul {
      list-style-type: none;
    }
    .box {
      width: 400px;
      height: 300px;
      border: 1px solid #ccc;
      margin: 100px auto;
      overflow: hidden;
    }
    .hd {
      height: 45px;
    }
    .hd span {
      display: inline-block;
      width: 90px;
      background-color: pink;
      line-height: 45px;
      text-align: center;
      cursor: pointer;
    }
    .hd span.current {
      background-color: yellowgreen;
    }
    .bd li {
      height: 255px;
      background-color: yellowgreen;
      display: none;
    }
    .bd li.current {
      display: block;
      font-size: 36px;
    }
  </style>
</head>
<body>
<p class="box" id="box">
  <p class="hd">
    <span class="current">体育</span>
    <span>娱乐</span>
    <span>新闻</span>
    <span>综合</span>
  </p>
  <p class="bd">
    <ul>
      <li class="current">我是体育模块</li>
      <li>我是娱乐模块</li>
      <li>我是新闻模块</li>
      <li>我是综合模块</li>
    </ul>
  </p>
</p>
<script>
  var box = document.getElementById("box");
  var spans = box.getElementsByTagName("span");
  var lis = box.getElementsByTagName("li");
  for (var i = 0; i < spans.length; i++) {
    spans[i].aaa = i;
    spans[i].onclick = function () {
      for (var i = 0; i < spans.length; i++) {
        spans[i].className = "";
        lis[i].className = "";
      }
      this.className = "current";
      lis[this.aaa].className = "current";
    }
  }
</script>
</body>
</html>

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