dom-demo/offset.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>OffsetFrame</title>
    <script src="./logFrame.js"></script>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        h1 {
            background-color: sandybrown;
            text-align: center;
        }
        .container {
            position: absolute;
            top: 70px;
            box-sizing: border-box;
            background-color: gray;
            width: 260px;
            height: 300px;
            border: blue 15px solid;
        }
        .box {
            background-color: red;
            box-sizing: border-box;
            width: 200px;
            height: 240px;
            border-top: blue 15px solid;
            border-bottom: green 16px solid;
            border-left: rebeccapurple 18px solid;
            border-right: gold 19px solid;
            padding-top: 11px;
            padding-bottom: 23px;
            margin-top: 25px;
            margin-left: 27px;
        }
    </style>
</head>
<body>
    <h1>欢迎来到前端小课</h1>
    <div class="container">
        <div class="box">《前端小课》由素燕创建，你现在学习的是第五阶段。关注公众号
            素燕，前端从 0 到 1.
        </div>
    </div>
    <script>
        logBySelector('.box');

    </script>
</body>
</html>