好程序员web前端分享CSS学习：HSLA颜色模式1.

好程序员web前端分享CSS学习：HSLA颜色模式

一、理论：
1.HSLA颜色模式
a.HSLA在HSL基础上增加了不透明度，值越大透明度越低
b.HSLA颜色模式的浏览器兼容性和HSL一样，只有较新版本的主流浏览器才支持
2.RGBA和HSLA颜色模式二者可以完全相互替换
3.RGBA/HSLA的IE兼容方案
a.在IE8以下版本，一般在前面设置一个非透明色，在其后紧跟一个RGBA/HSLA颜色模式
b.将透明的PNG图片平铺做为背景图片，适用于ie7-8
c.使用Gradient滤镜可以指定半透明颜色，将起止色设置为同一种颜色即可避免产生渐变

二、实践：
1.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style type="text/css">
.row{
overflow: hidden;
}
.row div{
width: 80px;
height: 80px;
line-height: 80px;
text-align: center;
float:left;
}
.row:nth-of-type(1) div {
background: hsla(183,50%,50%,1);
}
.row:nth-of-type(2) div {
background: hsla(133,50%,50%,.8);
}
.row:nth-of-type(3) div {
background: hsla(133,50%,50%,.6);
}
.row:nth-of-type(4) div{
background: hsla(133,50%,50%,.4);
}
.row div:nth-child(1){
background: hsla(133,50%,50%,.2);
}
.row div:nth-child(2){
background: hsla(133,50%,50%,.1);
}
.row div:nth-child(3){
background: hsla(133,50%,50%,.2);
}
.row div:nth-child(4){
background: hsla(133,50%,50%,.3);
}
.row div:nth-child(5){
background: hsla(133,50%,50%,.4);
}
.row div:nth-child(6){
background: hsla(133,50%,50%,.5);
}
.row div:nth-of-type(1) div {
background: hsla(133,50%,50%,.6);
}
</style>
</head>
<body>
<div class="demo">
<div class="row">
<div>
1
</div>
<div>
0.8
</div>
<div>
0.6
</div>
<div>
0.4
</div>
<div>
0.2
</div>
</div>
<div class="row">
<div>
1
</div>
<div>
0.8
</div>
<div>
0.6
</div>
<div>
0.4
</div>
<div>
0.2
</div>
</div>
<div class="row">
<div>
1
</div>
<div>
0.8
</div>
<div>
0.6
</div>
<div>
0.4
</div>
<div>
0.2
</div>
</div>
<div class="row">
<div>
1
</div>
<div>
0.8
</div>
<div>
0.6
</div>
<div>
0.4
</div>
<div>
0.2
</div>
</div>
<div class="row">
<div>
1
</div>
<div>
0.8
</div>
<div>
0.6
</div>
<div>
0.4
</div>
<div>
0.2
</div>
</div>
</div>
</body>

</html>