css如何设置图片透明度

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我是靠谱客的博主沉默荔枝，这篇文章主要介绍css如何设置图片透明度，现在分享给大家，希望可以做个参考。

本教程操作环境：windows7系统、CSS3&&HTML5版、Dell G3电脑。

图片透明度设置

复制代码.opacity img{opacity: 0.5;}1
.opacity img{opacity: 0.5;}
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代码和效果图片如下。

复制代码<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style> 
        body {
            background:url(../images/bg.jpg) no-repeat; 
            }
        .opacitybox{
            width: 400px;
            height: 200px;
            margin:0 auto; 
            margin-top:320px;
            }
        .opacity img{
            opacity: 0.5;
            }
    </style>
</head>
<body>
        <div class= "opacitybox opacity">
            <img src="../images/img.jpg" alt="" width="100%">
        </div>
</body>
</html>1
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style> 
        body {
            background:url(../images/bg.jpg) no-repeat; 
            }
        .opacitybox{
            width: 400px;
            height: 200px;
            margin:0 auto; 
            margin-top:320px;
            }
        .opacity img{
            opacity: 0.5;
            }
    </style>
</head>
<body>
        <div class= "opacitybox opacity">
            <img src="../images/img.jpg" alt="" width="100%">
        </div>
</body>
</html>
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