图片自动匹配宽高-526互联

<!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>
        * {
            margin: 0;
            padding: 0;
        }

        .wrap {
            margin: 50px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            width: 300px;
            height: 600px;
            border: 1px solid red;
        }

        .wrap div {
            width: 100%;
            flex: 1;
            border: 1px solid red;
            color: #000;
        }

        .wrap .top {
            position: relative;
        }

        .inner {
            position: absolute;
            inset: 0;
            border: 1px solid red;
        }

        .wrap .top img {
            width: 100%;
            height: 100%;
            /* default  */
            object-fit: fill;
        }

        .wrap .middle {
            background: url(./search-button.png);
            background-position: top;
            background-repeat: repeat-y;
            background-size: cover;
        }
    </style>
</head>

<body>
    <div class="wrap">
        <div class="top">
            <!-- 自动匹配容器 宽高 - 需要设定外层容器 -->
            <div class="inner">
                <img src="./search-button.png" alt="">
            </div>

        </div>
        <div class="middle">middle</div>
        <div class="bottom"><img src="./search-button.png" alt=""></div>
    </div>
</body>

</html>