abstract：<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>获取随机颜色</title> </head> <style type='text/css'> a{display:bl
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>获取随机颜色</title>
</head>
<style type='text/css'>
a{display:block;
width: 100px;
height: 100px;
line-height: 100px;
text-align: center;
margin:100px ;
border-radius: 50px;
float: left;
text-decoration: none;
color:white;
transition: All 0.4s ease-in-out;
}
</style>
<script type='text/javascript' src="jquery-3.3.1.js"></script>
<script type="text/javascript">
function color(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)+')';
}
}
$(document).ready(function(){
color('a')
$('a').mouseover(function(){
$bg=$(this).css('backgroundColor')
$(this).css('box-shadow','0 0 20px '+$bg)
$(this).css('border-radius','20px')
$(this).css('transform','scale(1.5)')
})
$('a').mouseleave(function(){
$(this).css('box-shadow','none')
$(this).css('border-radius','50px')
$(this).css('transform','scale(1)')
})
})
</script>
<body>
<a href="">1</a>
<a href="">2</a>
<a href="">3</a>
<a href="">4</a>
<div>Math.floor() 取整<br>
Math.random()*256获取随机数
</div>
</body>
</html>
Correcting teacher：天蓬老师Correction time：2019-01-01 15:17:35
Teacher's summary：Math.random()*256)+','+Math.floor(), Math是一个非常重要有用的原生内置对象, 很多与计算相关的运算都要用到它的