节点操作（添加-删除-插入）

Posted 2020-12-13 zxh-null

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了节点操作（添加-删除-插入）相关的知识，希望对你有一定的参考价值。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>插入节点 insertBefore</title>
    <style>
        div#parent{
            width:600px;
            height:300px;
            background: yellowgreen;
            overflow-y: auto;
        }
        a{
            display: inline-block;
            margin-right:10px;
            margin-bottom:10px;
            cursor: pointer;
        }
    </style>
</head>
<body>
    bbbbbbbbbbbbbbbbbbbbbbb<br/>
    bbbbbbbbbbbbbbbbbbbbbbb<br/>

    <div id="parent">
        <div id="one">第一个节点</div>
        <!--  -->
        <div id="tow">第二个节点</div>
    </div>

    bbbbbbbbbbbbbbbbbbbbbbb<br/>
    bbbbbbbbbbbbbbbbbbbbbbb<br/>
    bbbbbbbbbbbbbbbbbbbbbbb<br/>
    <a href="javascript:add()">增加a</a>
    <script>
   
        function add(){
            var a=document.createElement("a");
            a.title="html5";
            var oimg=document.createElement(‘img‘);
            oimg.src="img/tab_19.jpg";
            a.appendChild(oimg);
            var opar=document.getElementById("parent");
            var tow=document.getElementById("tow");
            opar.insertBefore(a,tow);//父.insertBefore(新，旧)
            a.onclick=function(){
                opar.removeChild(this);//父节点.removeChild(子节点)
            }
        }
    </script>
</body>
</html>