贪吃蛇边框案例

  • 案例名称：贪吃蛇边框案例
  • 案例人员：杨标
  • 案例平台：HTML+CSS
  • 完成时间：2019年8月31日

效果图

tanchishe.gif

案例说明

本题主要考察的其实就是对CSS的属性clip-path的掌握情况，同时对CSS动画做了一定的回顾

案例代码

<!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>蛇形边框</title>
    <style>
        .box {
            width: 200px;
            height: 200px;
            background-color: lightseagreen;
            position: relative;
        }
        .box::before {
            content: "";
            display: block;
            position: absolute;
            background-color: deeppink;
            width: 100%;
            height: 100%;
            left: -5px;
            top: -5px;
            z-index: -1;
            border: 5px solid deeppink;
            animation: zhuan 2s linear infinite;
            clip-path: inset(0px 200px 0px 0px);
        }
        @keyframes zhuan {
            0% {
                clip-path: inset(0px 200px 0px 0px);
            }
            25% {
                clip-path: inset(0px 0px 200px 0px);
            }
            50% {
                clip-path: inset(0px 0px 0px 200px);
            }
            75% {
                clip-path: inset(200px 0px 0px 0px);
            }
            100% {
                clip-path: inset(0px 200px 0px 0px);
            }
        } 
    </style>
</head>
<body>
    <div class="box"></div>
</body>
</html>