How to implement js tab

The example of this article describes the implementation method of js tab. Share it with everyone for your reference. The specific analysis is as follows:

1. Ideas

1. Get the element;

2. Add onclick (click) or onmousemove (move in) event to the for loop button element;

3. When the current button is clicked, it will be displayed in a highlighted state. Through the for loop, set the style of all buttons to empty and set the display of all divs to none.

4. Click the current button to add a style, display the current div, and set display to block.

2. HTML code:

<div id="div1">
    <input type="button" class="active" value="1"/>
    <input type="button" value="2"/>
    <input type="button" value="3"/> 
    <input type="button" value="4"/>
      <div class="div2" style="display:block;">11</div>
      <div class="div2">22</div>
      <div class="div2">33</div>
      <div class="div2">44</div>
</div>

3. CSS part:

.active
{
background:#9CC;
}
.div2
{
width:300px;
height:200px;
border:1px #666666 solid;
display:none;
}

4. JS code:

<script>
window.onload=function(){
   var odiv=document.getElementById(&#39;div1&#39;);//获取div
   var btn=odiv.getElementsByTagName(&#39;input&#39;);//获取div下的input
   var div2=odiv.getElementsByTagName(&#39;div&#39;) ;//获取div下的div
 
  for(i=0;i<btn.length;i++)//循环每个按钮
   {
     btn[i].index=i
//btn[i]是指定button的第i个按钮;为该按钮添加一个index属性，并将index的值设置为i
     btn[i].onclick=function()//按钮的第i个点击事件
    {
    for(i=0;i<btn.length;i++)//循环去掉button的样式，把div隐藏
     {
       btn[i].className=&#39;&#39; //清空按钮的样式
       div2[i].style.display=&#39;none&#39;//隐藏div
      }
        this.className=&#39;active&#39;//自身添加active
        div2[this.index].style.display=&#39;block&#39;//this.index是当前div
    }
   }
}
</script>

I hope this article will be helpful to everyone’s javascript programming.

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