好程式設計師 web前端分享 CSS學習：HSLA顏色模式

一、理論：
1.HSLA顏色模式
a.HSLA在HSL基礎上增加了不透明度，值越大透明度越低
b.HSLA顏色模式的瀏覽器相容性和HSL一樣，只有較新版本的主流瀏覽器才支援
2.RGBA和HSLA顏色模式二者可以完全相互替換
3.RGBA/HSLA的IE相容方案
a.在IE8以下版本，一般在前面設定一個非透明色，在其後緊跟一個RGBA/HSLA顏色模式
b.將透明的PNG圖片平鋪做為背景圖片，適用於ie7-8
c.使用Gradient濾鏡可以指定半透明顏色，將起止色設定為同一種顏色即可避免產生漸變

二、實踐：
1.

<!DOCTYPE html>  
<html>  
<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>  
    <div>  
        <div>  
            1  
        </div>  
        <div>  
            0.8  
        </div>  
        <div>  
            0.6  
        </div>  
        <div>  
            0.4  
        </div>  
        <div>  
            0.2  
        </div>  
    </div>  
    <div>  
        <div>  
            1  
        </div>  
        <div>  
            0.8  
        </div>  
        <div>  
            0.6  
        </div>  
        <div>  
            0.4  
        </div>  
        <div>  
            0.2  
        </div>  
    </div>  
    <div>  
        <div>  
            1  
        </div>  
        <div>  
            0.8  
        </div>  
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            0.6  
        </div>  
        <div>  
            0.4  
        </div>  
        <div>  
            0.2  
        </div>  
    </div>  
    <div>  
        <div>  
            1  
        </div>  
        <div>  
            0.8  
        </div>  
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        </div>  
        <div>  
            0.4  
        </div>  
        <div>  
            0.2  
        </div>  
    </div>  
    <div>  
        <div>  
            1  
        </div>  
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            0.8  
        </div>  
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            0.6  
        </div>  
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            0.4  
        </div>  
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            0.2  
        </div>  
    </div>  
</div>  
  
</body>  
</html>

好程式設計師web前端分享CSS學習：HSLA顏色模式

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