新手关于dom操作class的问题
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>css获取设置</title>
<style>
.aaa{
font-size: 30px;
}
.bbb{
color:red;
}
.ccc{
text-decoration: underline;
}
.ddd{
background-color: #666;
}
</style>
<script>
window.onload=function(){
var box=document.getElementById("box");
box.className="aaa";
box.addClass("ccc")
}
</script>
</head>
<body>
<div id="box">一段文字</div>
</body>
</html>我使用addClass（）不是应该在原来的基础上再增加一个“ccc”的类吗？ 方法前面去掉box.也不行 请问是怎么回事啊
Ni14浏览 1161回答 3
3回答
-
慕粉1103124771
你把js和jquery弄混了，jquery是这样$("#box).addClass("ccc");js是box.setAttribute("class","ccc"); -
慕的地8582982
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