随机颜色按钮
<!DOCTYPE html>
<html>
<head>
<title>评论功能练习</title>
<meta charset="utf-8">
<!-- <link rel="icon" type="image/x-icon" href="static/images/logo.png">
<link rel="stylesheet" type="text/css" href="static/style.css"> -->
<style type="text/css">
body{
width: 100%;
height: 2000px;
}
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;
}
#btn{
width: 150px;
height: 50px;
background: #20DAC9;
border-radius: 5px;
border: none;
}
#btn:hover{
background:#61D4FD;
}
</style>
<script type="text/javascript" src="static/jquery-3.3.1.min.js"></script>
</head>
<body>
<body>
<a href="#">1</a>
<a href="#">2</a>
<a href="#">3</a>
<a href="#">4</a>
<input id="btn" type="button" value="随机色" >
</body>
<script type="text/javascript">
function aa(tag){
var len=document.getElementsByTagName(tag).length;
for(var i=0;i<len;i++){
var bs=document.getElementsByTagName(tag);
var r=Math.floor(Math.random()*256);
var g=Math.floor(Math.random()*256);
var b=Math.floor(Math.random()*256);
bs[i].style.backgroundColor='rgb('+r+','+g+','+b+')';
bs[i].innerHTML='#'+r+','+g+','+b;
}
}
$(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');
})
$('#btn').click(function(){
aa('a');
})
$('a').click(function(){
var yan=$(this).css('background');
$('body').css('background',yan);
})
})
</script>
</body>
</html>