本文已参与「新人创作礼」活动，一起开启掘金创作之路。
本文已参与「新人创作礼」活动，一起开启掘金创作之路。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jquery动态修改伪类:after:before</title>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<style>
*{
padding: 0;
margin: 0;
}
body{
padding: 0;
margin: 0;
}
#box{
width: 200px;
height: 200px;
position: fixed;
top: calc(50% - 100px);
left: calc(50% - 100px);
background: #0877FF;
border-radius: 10px;
text-align: center;
box-shadow: 1px 2px 3px -1px;
}
#box:after{
content: attr(data-content-after);
position: relative;
top: -120px;
left: -160px;
width: 104px;
height: 100px;
line-height: 100px;
text-align: center;
border-radius: 10px;
background: orange;
box-shadow: 1px 2px 3px -1px;
display: block;
}
#box:before{
content: attr(data-content-before);
position: relative;
top: 0;
right: -260px;
width: 104px;
height: 100px;
line-height: 100px;
text-align: center;
border-radius: 10px;
background: #39c778;
box-shadow: 1px 2px 3px -1px;
display: block;
}
</style>
</head>
<body>
<div id="box" data-content-before=":before" data-content-after=":after">box盒子</div>
<script type="text/javascript">
//jquery直接用attr方法替换，简单粗暴；
$('#box').attr("data-content-before",':before伪元素');
$('#box').attr("data-content-after",':after伪元素');
</script>
</body>
</html>
