使用hover()函数处理CSS伪元素。您可以尝试运行以下代码来学习如何操作CSS伪元素-
<!DOCTYPE html>
<html>
<head>
<script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$('span').hover(function(){
$(this).addClass('change').attr('data-content','bar');
});
});
</script>
<style>
span.change:after {
content: attr(data-content) ' This is demo text.';
}
</style>
</head>
<body>
<p>Place cursor below...</p>
<span>foo</span>
</body>
</html>