4 JavaScript methods to implement simple tab switching_javascript skills-JS Tutorial-php.cn

4 JavaScript methods to implement simple tab switching_javascript skills

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Release： 2016-05-16 15:21:43

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This article explains 4 methods of simple tab switching using JavaScript and shares them with you for your reference. The specific content is as follows
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Method 1: for loop + if to determine whether the current click matches the custom array

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>tab切换</title>
  <style type="text/css">
    button {
      width:120px;
      height: 32px;
      line-height: 32px;
      background-color: #ccc;
      font-size: 24px;
    }
    div {
      display: none;
      width:200px;
      height: 200px;
      font-size: 72px;
      color:#ddd;
      background-color: green;
      border:1px solid black;
    }
  </style>
</head>
<body>
  <button style="background-color: yellow;">1</button>
  <button>2</button>
  <button>3</button>
  <button>4</button>
  <div style="display:block;">1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <script type="text/javascript">
  //定义数组并获取数组内各个的节点
  var buttonArr = document.getElementsByTagName("button");
  var divArr = document.getElementsByTagName("div");
  for(var i = 0; i < buttonArr.length;i++) {
    buttonArr[i].onclick = function() {
      //this 
      // alert(this.innerHTML)
      //for循环遍历button数组长度
      for(var j = 0; j < buttonArr.length; j++) {
        //重置所有的button样式
        buttonArr[j].style.backgroundColor = "#ccc";
        //给当前的(点击的那个)那个button添加样式
        this.style.backgroundColor = "yellow";
        //隐藏所有的div
        divArr[j].style.display = "none";
        //判断当前点击是按钮数组中的哪一个？
        if(this == buttonArr[j]) {
          // alert(j);
           //显示点击按钮对应的div
          divArr[j].style.display = "block";
        }
      }
    }
  }
  </script>
</body>
</html>

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Method 2: Customize the index to the current click

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>tab切换</title>
  <style type="text/css">
    button {
      width:120px;
      height: 32px;
      line-height: 32px;
      background-color: #ccc;
      font-size: 24px;
    }
    div {
      display: none;
      width:200px;
      height: 200px;
      font-size: 72px;
      color:#ddd;
      background-color: green;
      border:1px solid black;
    }
  </style>
</head>
<body>
  <button style="background-color: yellow;">1</button>
  <button>2</button>
  <button>3</button>
  <button>4</button>
  <div style="display:block;">1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <script type="text/javascript">
  var buttonArr = document.getElementsByTagName("button");
  var divArr = document.getElementsByTagName("div");
  for(var i = 0; i < buttonArr.length;i++) {
    buttonArr[i].index = i;
    // buttonArr[i].setAttribute("index",i);
    buttonArr[i].onclick = function() {
      for(var j = 0; j < buttonArr.length; j++) {
        buttonArr[j].style.backgroundColor = "#ccc";
        buttonArr[this.index].style.backgroundColor = "yellow";
        divArr[j].style.display = "none";
        divArr[this.index].style.display = "block";
      }
    }
  }
  
  </script>
</body>
</html>

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Method three: className

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>tab</title>
  <style type="text/css">
    * {padding:0; margin:0;}
    button {
      background-color: #ccc;
      width:80px;
      height: 30px;
    }
    .btn-active {
      background-color: yellow;
      font-weight:bold;
      font-size: 14px;
    }
    div{
      width:200px;
      height: 200px;
      font-size: 64px;
      background-color: #0c0;
      display: none;
      color:#fff;
    }
    .div-active {
      display: block;
    }
  </style>
</head>
<body>
  <button class="btn-active">按钮1</button>
  <button>按钮2</button>
  <button>按钮3</button>
  <button>按钮4</button>
  <div class="div-active">1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <script type="text/javascript">
  //1.先获取元素
  var buttonList = document.getElementsByTagName("button");
  var divList = document.getElementsByTagName("div");
  //2.添加事件
  for(var i = 0; i < buttonList.length; i++) {
    buttonList[i].index = i;
    buttonList[i].onclick = function() {
      for(var j = 0; j < buttonList.length;j++) {
        buttonList[j].className = "";
        divList[j].className = "";
      }
      this.className = "btn-active";
      divList[this.index].className = "div-active";
    }
  }
  </script>
</body>
</html>

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Method 4: Self-execution of className+anonymous function

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>tab</title>
  <style type="text/css">
    * {padding:0; margin:0;}
    button {
      background-color: #ccc;
      width:80px;
      height: 30px;
    }
    .btn-active {
      background-color: yellow;
      font-weight:bold;
      font-size: 14px;
    }
    div{
      width:200px;
      height: 200px;
      font-size: 64px;
      background-color: #0c0;
      display: none;
      color:#fff;
    }
    .div-active {
      display: block;
    }
  </style>
</head>
<body>
  <button class="btn-active">按钮1</button>
  <button>按钮2</button>
  <button>按钮3</button>
  <button>按钮4</button>
  <div class="div-active">1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <script type="text/javascript">
  //1.先获取元素
  var buttonList = document.getElementsByTagName("button");
  var divList = document.getElementsByTagName("div");
  //2.添加事件
  for(var i = 0; i < buttonList.length; i++) {
    (function(i){ //匿名函数自执行
       buttonList[i].onclick = function() {
        for(var j = 0; j < buttonList.length;j++) {
          buttonList[j].className = "";
          divList[j].className = "";
        }
        this.className = "btn-active";
        divList[i].className = "div-active";
      }
    })(i)
  }
  </script>
</body>
</html>

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I hope this article will be helpful to everyone learning JavaScript programming.