JavaScript实现动态选项卡切换-优快云博客

本文链接：https://blog.youkuaiyun.com/wang_swa99er/article/details/120128122

用JS写一个选项卡

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #div1 button{width: 100px;height: 30px;background-color: gray;color: white;font-size: 10px;}
        #div1 .active{background-color: orange;color: blue;}
        #div1 div{width: 340px;height: 300px;border: 1px solid black;display: none;}
    </style>
    <script>
        window.onload = function(){
            var oDiv1=document.getElementById("div1");
            var aBtns=oDiv1.getElementsByTagName("button");
            var aDivs=oDiv1.getElementsByTagName("div");

            //给每一个按钮添加点击
            for(var i = 0;i<aBtns.length;i++)
            {
                aBtns[i].index = i;
                aBtns[i].onclick = function(){
                  for(var j = 0;j<aBtns.length;j++)
                {
                    aBtns[j].className = '';
                    aDivs[j].style.display = 'none';
                }
                aDivs[this.index].style.display = 'block';
                this.className = 'active';  
                }
            }
        }
    </script>
</head>
<body>
    <div id="div1">
       <button class="active">HTML</button> 
       <button>Python</button>
       <button>Java</button>
       <div style="display: block;">1111</div>
       <div>222</div>
       <div>333</div>
    </div>
</body>
</html>