好吧今天写个js，不知道怎么添加类名了
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css" media="screen">
#box {
width: 200px;
height: 200px;
margin: 0 auto;
background: pink;
border-radius: 20px;
}
@keyframes move{
0%{width: 500px; background-color: red;}
10%{width: 100px; background-color: green;},
20%{width: 900px; background-color: yellow;},
50%{width: 300px; background-color: pink;},
80%{width: 550px; background-color: gold;},
100%{width: 200px; background-color: purple;}
}
.movea {
animation: move 1s ;
}
</style>
</head>
<body>
<div id='box'>
</div>
<script type="text/javascript">
document.getElementById('box').onclick = function() {
this.setAttribute("class", "movea");
this.classList.add("movea");
}
</script>
</body>
</html>
二 .使用原生JS给元素--添加/删除类名
var dom = document.getElementById("idName");
添加 单个 class:
dom.classList.add("className1");
添加多个类:
dom.classList.add("className1", "className2", "className3", ....., "classNameN");
移除一个类:
dom.classList.remove("className1");
移除多个类:
dom.classList.remove("className1", "className2", "className3", ....., "classNameN");
检查是否含有某个类
dom.classList.contains('className'); //return true or false
