abstract：<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>按钮获取随机数</title> <script type="
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>按钮获取随机数</title>
<script type="text/javascript" src="../jquery-3.4.1.min.js"></script>
<style type="text/css">
a{float: left;
display: block;
margin: 50px;
width: 100px;
line-height: 100px;
text-align: center;
height: 100px;
color: black;
border-radius: 50px;
text-decoration: none;
}
.btn{border: none;background-color: orange;color: green}
</style>
<script type="text/javascript">
function aa(tag) {
var 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)+')'
}
}
function bb(tag1){
var len = document.getElementsByTagName(tag1).length;
for (var i=0;i<len;i++){
document.getElementsByTagName(tag1)[i].innerText= Math.floor(Math.random()*100);
}
}
$(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')
});
$('button').click(function () {
aa('a');
bb('a');
})
})
</script>
</head>
<body>
<a href="#">1</a>
<a href="#">2</a>
<a href="#">3</a>
<a href="#">4</a>
<a href="#">5</a><br><br><br><br>
<button class="btn">获取随机</button>
</body>
</html>
Correcting teacher：天蓬老师Correction time：2019-05-28 16:56:45
Teacher's summary：获取随机的颜色, 是通过调用一个js内置函数来实现的, 本质上与jQuery无关