classList的使用 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>Title</title>
    <style>
        .changebig{
            font-size: 30px;
        }
    </style>
</head>
<body>
<div class="div1 div2" id="ID1">hello1
    <div>hello2</div>
    <p>pp</p>

</div>
<script>
    var ele=document.getElementById('ID1');
//    alert(ele.className);//div1 div2
    ele.classList.add('changebig');//给div标签添加类名为changebig的属性
    ele.classList.remove('changebig');//取消类名为changebig的属性
</script>

</body>
</html>
posted @ 2020-02-05 17:55  Stary_tx  阅读(209)  评论(0)  编辑  收藏  举报