index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>推箱子</title>
    <style>
        #game{
            margin: 0 auto;
            position: relative;
        }

        #game .item{
            position: absolute;
            width: 45px;
            height: 45px;
            background-size: 100% 100%;
            /* 用JS控制坐标 */
        }
        #game .wall{
            background-image: url("imgs/wall.jpg");
        }
        #game .box{
            background-image: url("imgs/box.png");
        }
        #game .player{
            background-image: url("imgs/player.png");
        }
        /* 正确状态的箱子 */
        #game .correct-box{
            background-image: url("imgs/over_box.png");
        }
        #game .correct{
            border: 2px solid rgb(24, 151, 24);
            /* 设置下面的属性之后，宽高影响的范围是边框盒 */
            box-sizing: border-box;
        }
    </style>
</head>
<body>
    <div id="game">

    </div>
    <script src="js/index.js" type="module"></script>
</body>
</html>