323 lines
10 KiB
JavaScript
323 lines
10 KiB
JavaScript
< !DOCTYPE html >
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Index.js 示例应用</title>
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<style>
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* {
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margin: 0;
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padding: 0;
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box-sizing: border-box;
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font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
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}
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body {
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background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
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color: #fff;
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min-height: 100vh;
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padding: 20px;
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}
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.container {
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max - width: 1200px;
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margin: 0 auto;
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}
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header {
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text - align: center;
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padding: 30px 0;
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margin-bottom: 40px;
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}
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h1 {
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font - size: 2.8rem;
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margin-bottom: 10px;
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text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
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}
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.subtitle {
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font - size: 1.2rem;
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opacity: 0.9;
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}
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.card-container {
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display: grid;
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grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
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gap: 25px;
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margin-bottom: 40px;
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}
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.card {
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background: rgba(255, 255, 255, 0.1);
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backdrop-filter: blur(10px);
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border-radius: 15px;
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padding: 25px;
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box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
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transition: transform 0.3s ease, box-shadow 0.3s ease;
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}
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.card:hover {
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transform: translateY(-5px);
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box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
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}
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.card h2 {
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font - size: 1.5rem;
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margin-bottom: 15px;
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display: flex;
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align-items: center;
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gap: 10px;
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}
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.card h2 i {
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font - size: 1.8rem;
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}
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.card p {
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line - height: 1.6;
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margin-bottom: 20px;
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}
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.btn {
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display: inline-block;
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background: #ff6b6b;
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color: white;
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padding: 10px 20px;
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border-radius: 50px;
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text-decoration: none;
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font-weight: 600;
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transition: all 0.3s ease;
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border: none;
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cursor: pointer;
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}
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.btn:hover {
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background: #ff5252;
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transform: scale(1.05);
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}
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.demo-area {
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background: rgba(255, 255, 255, 0.1);
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backdrop-filter: blur(10px);
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border-radius: 15px;
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padding: 30px;
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margin-top: 30px;
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box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
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}
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.demo-area h2 {
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margin - bottom: 20px;
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font-size: 1.8rem;
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}
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.counter {
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display: flex;
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align-items: center;
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justify-content: center;
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gap: 20px;
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margin-bottom: 30px;
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}
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.counter button {
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width: 50px;
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height: 50px;
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border-radius: 50%;
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font-size: 1.5rem;
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display: flex;
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align-items: center;
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justify-content: center;
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}
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.counter span {
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font - size: 2.5rem;
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font-weight: bold;
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min-width: 80px;
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text-align: center;
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}
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.user-list {
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display: grid;
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grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
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gap: 15px;
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margin-top: 20px;
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}
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.user-card {
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background: rgba(255, 255, 255, 0.15);
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padding: 15px;
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border-radius: 10px;
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text-align: center;
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}
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.user-card img {
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width: 60px;
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height: 60px;
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border-radius: 50%;
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margin-bottom: 10px;
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object-fit: cover;
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}
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.user-card h3 {
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font - size: 1rem;
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margin-bottom: 5px;
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}
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.user-card p {
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font - size: 0.8rem;
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opacity: 0.8;
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}
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footer {
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text - align: center;
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margin-top: 50px;
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padding: 20px;
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font-size: 0.9rem;
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opacity: 0.8;
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}
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@media (max-width: 768px) {
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h1 {
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font - size: 2.2rem;
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}
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.card-container {
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grid - template - columns: 1fr;
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}
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}
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</style>
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</head>
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<body>
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<div class="container">
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<header>
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<h1>Index.js 示例应用</h1>
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<p class="subtitle">展示现代JavaScript在前端开发中的强大功能</p>
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</header>
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<div class="card-container">
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<div class="card">
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<h2><i>📁</i> 模块化开发</h2>
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<p>使用ES6模块系统组织代码，提高可维护性和复用性。</p>
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<button class="btn" onclick="showModuleExample()">查看示例</button>
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</div>
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<div class="card">
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<h2><i>🔄</i> 异步操作</h2>
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<p>使用async/await和Promise处理异步操作，提高代码可读性。</p>
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<button class="btn" onclick="showAsyncExample()">查看示例</button>
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</div>
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<div class="card">
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<h2><i>🎯</i> DOM操作</h2>
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<p>使用现代JavaScript高效操作DOM，创建动态用户界面。</p>
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<button class="btn" onclick="showDOMExample()">查看示例</button>
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</div>
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</div>
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<div class="demo-area">
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<h2>JavaScript功能演示</h2>
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<div class="counter">
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<button class="btn" onclick="decrement()">-</button>
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<span id="count">0</span>
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<button class="btn" onclick="increment()">+</button>
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</div>
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<button class="btn" onclick="fetchUsers()">加载用户数据</button>
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<div id="user-list" class="user-list">
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<!-- 用户数据将在这里显示 -->
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</div>
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</div>
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<footer>
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<p>Index.js 示例应用 © 2023 | 展示现代JavaScript开发实践</p>
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</footer>
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</div>
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<script>
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// 计数器状态
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let count = 0;
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// DOM元素引用
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const countElement = document.getElementById('count');
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const userListElement = document.getElementById('user-list');
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// 计数器功能
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function increment() {
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count++;
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updateCountDisplay();
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}
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function decrement() {
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count--;
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updateCountDisplay();
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}
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function updateCountDisplay() {
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countElement.textContent = count;
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// 添加动画效果
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countElement.style.transform = 'scale(1.2)';
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setTimeout(() => {
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countElement.style.transform = 'scale(1)';
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}, 200);
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}
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// 异步获取用户数据
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async function fetchUsers() {
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try {
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userListElement.innerHTML = '<p>加载中...</p>';
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// 使用公共API获取随机用户数据
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const response = await fetch('https://jsonplaceholder.typicode.com/users');
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const users = await response.json();
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displayUsers(users.slice(0, 6)); // 只显示前6个用户
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} catch (error) {
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userListElement.innerHTML = '<p>加载用户数据时出错</p>';
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console.error('Error fetching users:', error);
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}
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}
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// 显示用户数据
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function displayUsers(users) {
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userListElement.innerHTML = '';
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users.forEach(user => {
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const userCard = document.createElement('div');
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userCard.className = 'user-card';
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// 生成随机头像（使用占位符服务）
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const randomId = Math.floor(Math.random() * 100);
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const avatarUrl = `https://i.pravatar.cc/100?img=${randomId}`;
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userCard.innerHTML = `
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<img src="${avatarUrl}" alt="${user.name}">
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<h3>${user.name}</h3>
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<p>${user.email}</p>
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`;
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userListElement.appendChild(userCard);
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});
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}
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// 示例功能
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function showModuleExample() {
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alert('模块化示例：\n\n// math.js\nexport function add(a, b) {\n return a + b;\n}\n\n// index.js\nimport { add } from \'./math.js\';\nconsole.log(add(2, 3)); // 5');
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}
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function showAsyncExample() {
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alert('异步操作示例：\n\nasync function fetchData() {\n try {\n const response = await fetch(\'api/data\');\n const data = await response.json();\n return data;\n } catch (error) {\n console.error(\'Error:\', error);\n }\n}');
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}
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function showDOMExample() {
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alert('DOM操作示例：\n\n// 创建元素\nconst newElement = document.createElement(\'div\');\nnewElement.textContent = \'Hello World!\';\n\n// 添加到DOM\ndocument.body.appendChild(newElement);\n\n// 事件监听\nnewElement.addEventListener(\'click\', () => {\n alert(\'元素被点击了!\');\n});');
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}
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// 初始化
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document.addEventListener('DOMContentLoaded', () => {
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updateCountDisplay();
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console.log('Index.js 示例应用已加载完成!');
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});
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</script>
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</body>
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</html> |