HTML5革命：构建下一代渐进式Web应用骨架

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2025-07-23 0 238

HTML5革命：构建下一代渐进式Web应用骨架

一、PWA架构设计

基于App Shell模型+Service Worker+Web Manifest的现代Web应用架构，实现原生应用体验

二、核心技术实现

1. 应用外壳HTML结构

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>我的PWA应用</title>
    <link rel="manifest" href="/manifest.webmanifest" rel="external nofollow" >
    <style>
        /* App Shell基础样式 */
        #app-shell {
            display: grid;
            grid-template-rows: auto 1fr auto;
            min-height: 100vh;
        }
        /* 关键CSS内联 */
    </style>
</head>
<body>
    <div id="app-shell">
        <header role="banner">
            <h1>应用标题</h1>
            <nav role="navigation"></nav>
        </header>
        
        <main role="main" id="app-content">
            <!-- 动态内容区域 -->
        </main>
        
        <footer role="contentinfo">
            <p>© 2023 我的公司</p>
        </footer>
    </div>
    
    <script>
        // 注册Service Worker
        if ('serviceWorker' in navigator) {
            window.addEventListener('load', () => {
                navigator.serviceWorker.register('/sw.js');
            });
        }
    </script>
</body>
</html>

2. Service Worker核心逻辑

// sw.js - Service Worker核心
const CACHE_NAME = 'app-shell-v1';
const DYNAMIC_CACHE = 'dynamic-content-v1';
const ASSETS = [
    '/',
    '/index.html',
    '/styles/main.css',
    '/scripts/app.js',
    '/images/logo.svg'
];

// 安装阶段缓存App Shell
self.addEventListener('install', event => {
    event.waitUntil(
        caches.open(CACHE_NAME)
            .then(cache => cache.addAll(ASSETS))
    );
});

// 拦截网络请求
self.addEventListener('fetch', event => {
    event.respondWith(
        caches.match(event.request)
            .then(response => {
                // 返回缓存或网络请求
                return response || fetch(event.request)
                    .then(fetchResponse => {
                        // 动态缓存API响应
                        if(event.request.url.includes('/api/')) {
                            return caches.open(DYNAMIC_CACHE)
                                .then(cache => {
                                    cache.put(event.request.url, fetchResponse.clone());
                                    return fetchResponse;
                                });
                        }
                        return fetchResponse;
                    });
            })
    );
});

三、Web Manifest配置

{
    "name": "我的PWA应用",
    "short_name": "PWA应用",
    "start_url": "/",
    "display": "standalone",
    "background_color": "#ffffff",
    "theme_color": "#4285f4",
    "icons": [
        {
            "src": "/icons/icon-192.png",
            "sizes": "192x192",
            "type": "image/png"
        },
        {
            "src": "/icons/icon-512.png",
            "sizes": "512x512",
            "type": "image/png"
        }
    ]
}