我自己写的案例
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>我自己写的案例</title>
<script type="text/javascript" src="jquery.js"></script>
<style type="text/css">
a {
float: left;
display: block;
margin: 50px;
width: 100px;
line-height: 100px;
text-align: center;
height: 100px;
color: #fff;
border-radius: 50px;
text-decoration: none;
}
</style>
<script type="text/javascript">
function aa(tag) {
let len = document.getElementsByTagName(tag).length
for (var i = 0; i < len; i++) {
document.getElementsByTagName(tag)[i].style.backgroundColor = 'rgb(' + Math.floor(Math.random() * 256) + ',' + Math.floor(Math.random() * 256) + ',' + Math.floor(Math.random() * 256) + ')'
}
}
$(document).ready(function () {
aa('a')
$('a').mouseover(function () {
$bg = $(this).css('backgroundColor')
$(this).css('box-shadow', '0px 0px 20px ' + $bg)
$(this).css('border-radius', '20px ')
})
$('a').mouseleave(function () {
$(this).css('box-shadow', 'none')
$(this).css('border-radius', '50px ')
})
})
</script>
</head>
<body>
<a href="#">1</a>
<a href="#">2</a>
<a href="#">3</a>
<a href="#">4</a>
</body>
</html>