前端学习（88）：透明度

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    #div1{
        width:100px;
        height: 100px;
        background: red;
        opacity: 0.5;
    }
    #div2{
        width:100px ;
        height: 100px;
        background: rgba(255,0,0,0.5);
    }
    </style>
</head>
<body>
    <div id="div1">我是歌谣</div>
    <p>我是顾顾</p>
    <div id="div2">我是歌谣</div>
</body>
</html>

运行结果

来源：CSDN

作者：你知道歌谣吗？

链接：https://blog.csdn.net/weixin_43392489/article/details/103465731

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