animation-timing-function 预定义关键词

实例代码

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS 动画时间函数演示</title>
    <style>
        body {
            font-family: 'Arial', sans-serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            background-color: #f5f5f5;
        }
        
        h1 {
            color: #333;
            text-align: center;
            margin-bottom: 30px;
        }
        
        .demo-container {
            background-color: white;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .animation-track {
            height: 60px;
            margin: 10px 0 30px;
            position: relative;
            background-color: #f0f0f0;
            border-radius: 4px;
            overflow: hidden;
        }
        
        .track-line {
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 2px;
            background-color: #ddd;
            transform: translateY(-50%);
        }
        
        .box {
            width: 40px;
            height: 40px;
            background-color: #3498db;
            border-radius: 4px;
            position: absolute;
            left: 10px;
            top: 50%;
            transform: translateY(-50%);
            animation: move 3s infinite;
        }
        
        .label {
            margin-top: 10px;
            font-size: 14px;
            color: #666;
            font-weight: bold;
        }
        
        .value {
            font-family: monospace;
            color: #e74c3c;
        }
        
        @keyframes move {
            0% { left: 10px; }
            100% { left: calc(100% - 50px); }
        }
        
        /* 不同的动画时间函数 */
        .ease { animation-timing-function: ease; }
        .linear { animation-timing-function: linear; }
        .ease-in { animation-timing-function: ease-in; }
        .ease-out { animation-timing-function: ease-out; }
        .ease-in-out { animation-timing-function: ease-in-out; }
        .step-end { animation-timing-function: step-end; }
        .step-start { animation-timing-function: step-start; }
        
        /* 添加一些视觉效果 */
        .box::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            width: 2px;
            height: 10px;
            background-color: #999;
            transform: translateX(-50%);
        }
    </style>
</head>
<body>
    <h1>CSS animation-timing-function 演示</h1>
    
    <div class="demo-container">
				<div class="label">默认值: <span class="value">ease</span> (慢-快-慢)</div>
        <div class="animation-track">
            <div class="track-line"></div>
            <div class="box ease"></div>
        </div>
        
        <div class="label">匀速运动: <span class="value">linear</span></div>
        <div class="animation-track">
            <div class="track-line"></div>
            <div class="box linear"></div>
        </div>
        
        <div class="label">慢速开始: <span class="value">ease-in</span> (慢-快)</div>
        <div class="animation-track">
            <div class="track-line"></div>
            <div class="box ease-in"></div>
        </div>
        
        <div class="label">慢速结束: <span class="value">ease-out</span> (快-慢)</div>
        <div class="animation-track">
            <div class="track-line"></div>
            <div class="box ease-out"></div>
        </div>
        
        <div class="label">慢速开始和结束: <span class="value">ease-in-out</span> (慢-快-慢)</div>
        <div class="animation-track">
            <div class="track-line"></div>
            <div class="box ease-in-out"></div>
        </div>
        
        <div class="label">步进结束: <span class="value">step-end</span> (等同于 steps(1, end))</div>
        <div class="animation-track">
            <div class="track-line"></div>
            <div class="box step-end"></div>
        </div>
        
        <div class="label">步进开始: <span class="value">step-start</span> (等同于 steps(1, start))</div>
        <div class="animation-track">
            <div class="track-line"></div>
            <div class="box step-start"></div>
        </div>
    </div>
</body>
</html>