删除所有的子节点 

<!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>Document</title>
    <style>
        #box {
            background: blue
        }
        
        #boxs {
            background: red
        }
        
        #boxs div {
            border: 1px solid black;
            width: 100px;
            height: 100px;
            background: gray
        }
    </style>
</head>

<body>

    <div id="box">
        <div id="boxs">
            <div></div>
            <div></div>
            <div></div>
        </div>
    </div>
    <button id="button">删除  </button>
</body>
<script>
    var f = document.getElementById("box");
    var childs = f.childNodes;
    console.log(length)
    var b = document.getElementById("button");
    b.onclick = function() {
        for (var i = childs.length - 1; i >= 0; i--) {
            f.removeChild(childs[i]);
        }


    }
</script>

</html>

 

posted @ 2017-09-20 15:58  莫笑我胡为  阅读(176)  评论(0)    收藏  举报