演示效果

2022-07-13_17-39-41.png

实现思路

先给背景设置了渐变颜色并且旋转一定角度，实现斜着的渐变效果。
接下来把背景放大500%，然后设置了一个15秒的动画，动画infinite无限循环。
动画部分就是对背景进行一个定位，实现渐变颜色的动态切换。

代码

html结构

<!--
 * @Descripttion: 
 * @version: 
 * @Author: siebe
 * @Date: 2022-07-13 17:08:40
 * @LastEditors: siebe
 * @LastEditTime: 2022-07-13 17:08:40
-->
<!DOCTYPE html>
<html lang="zh-CN">

<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>Demo</title>
    <link rel="stylesheet" href="style.css">
</head>

<body>
    <h1>动态渐变背景</h1>
</body>

</html>

css样式

body {
    margin: 0;
    padding: 0;

    height: 100vh;

    display: flex;
    justify-content: center;
    align-items: center;

    background: linear-gradient(135deg, #34ac40, #2c8ae8, #dc47cd, #e7e373);
    background-size: 500%;

    animation: bgAnimation 6s linear infinite;
}

h1 {
    color: white;
    letter-spacing: 5px;
}

@keyframes bgAnimation {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

gitee地址：siebe/html-css-demo (https://gitee.com/siebe/html-css-demo)