老师这样写对么？一定要写兼容性么？

来源：3-21 编程练习

蛤小蛤

2019-05-30 23:59:58

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>径向渐变</title>
    <style type="text/css">
        div{
            width: 400px;
            height: 400px;
            /*此处写代码*/
            background:repeating-radial-gradient(red 0%,orange 5%,yellow 10%,green 15%, cyan 20%, blue 25%,purple 30%);
        }
    </style>
</head>
<body>
    <div></div>  
</body>
</html>

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