feat(todo): add PWA support with offline capabilities

- Add web app manifest with app metadata and shortcuts
- Add service worker with network-first, cache-first, and network-only strategies
- Add offline fallback page with auto-reload on reconnection
- Add SVG placeholder icon for PWA
- Add PWA meta tags for iOS, Android, and Windows support
- Add comprehensive PWA guide documentation (docs/PWA_GUIDE.md)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Till-JS 2025-12-09 14:40:42 +01:00
parent d45a9db3fc
commit 1ac74c9bf5
6 changed files with 1292 additions and 2 deletions

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<!doctype html> <!doctype html>
<html lang="en"> <html lang="de">
<head> <head>
<meta charset="utf-8" /> <meta charset="utf-8" />
<link rel="icon" href="%sveltekit.assets%/favicon.png" />
<meta name="viewport" content="width=device-width, initial-scale=1" /> <meta name="viewport" content="width=device-width, initial-scale=1" />
<!-- Favicon -->
<link rel="icon" href="%sveltekit.assets%/favicon.png" />
<link rel="icon" type="image/svg+xml" href="/icons/icon.svg" />
<!-- PWA Manifest -->
<link rel="manifest" href="/manifest.json" />
<!-- Theme Color -->
<meta name="theme-color" content="#8b5cf6" />
<meta name="msapplication-TileColor" content="#8b5cf6" />
<!-- Apple iOS PWA -->
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="apple-mobile-web-app-title" content="Todo" />
<link rel="apple-touch-icon" href="/icons/icon.svg" />
<!-- Microsoft Tiles -->
<meta name="msapplication-config" content="none" />
%sveltekit.head% %sveltekit.head%
</head> </head>
<body data-sveltekit-preload-data="hover"> <body data-sveltekit-preload-data="hover">

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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
<defs>
<linearGradient id="bg" x1="0%" y1="0%" x2="100%" y2="100%">
<stop offset="0%" style="stop-color:#8b5cf6"/>
<stop offset="100%" style="stop-color:#7c3aed"/>
</linearGradient>
</defs>
<!-- Background -->
<rect width="512" height="512" rx="96" fill="url(#bg)"/>
<!-- Checkbox icon -->
<g fill="none" stroke="white" stroke-width="28" stroke-linecap="round" stroke-linejoin="round">
<!-- Checkbox outline -->
<rect x="120" y="140" width="120" height="120" rx="24" fill="none"/>
<!-- Checkmark -->
<path d="M150 200 L175 225 L220 170"/>
<!-- Lines (task text) -->
<line x1="280" y1="170" x2="392" y2="170"/>
<line x1="280" y1="230" x2="350" y2="230"/>
<!-- Second checkbox (unchecked) -->
<rect x="120" y="300" width="120" height="120" rx="24" fill="none"/>
<!-- Lines for second task -->
<line x1="280" y1="330" x2="392" y2="330"/>
<line x1="280" y1="390" x2="320" y2="390"/>
</g>
</svg>

After

Width:  |  Height:  |  Size: 1 KiB

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{
"name": "Todo - Aufgabenverwaltung",
"short_name": "Todo",
"description": "Aufgaben und Projekte verwalten mit Kanban-Board, Subtasks und mehr",
"start_url": "/",
"scope": "/",
"display": "standalone",
"background_color": "#ffffff",
"theme_color": "#8b5cf6",
"orientation": "any",
"categories": ["productivity", "utilities"],
"lang": "de",
"dir": "ltr",
"icons": [
{
"src": "/icons/icon.svg",
"sizes": "any",
"type": "image/svg+xml",
"purpose": "any"
},
{
"src": "/icons/icon.svg",
"sizes": "any",
"type": "image/svg+xml",
"purpose": "maskable"
}
],
"shortcuts": [
{
"name": "Neue Aufgabe",
"short_name": "Neu",
"description": "Neue Aufgabe erstellen",
"url": "/?action=new",
"icons": [
{
"src": "/icons/icon.svg",
"sizes": "any",
"type": "image/svg+xml"
}
]
},
{
"name": "Kanban Board",
"short_name": "Kanban",
"description": "Kanban-Ansicht öffnen",
"url": "/kanban",
"icons": [
{
"src": "/icons/icon.svg",
"sizes": "any",
"type": "image/svg+xml"
}
]
},
{
"name": "Einstellungen",
"short_name": "Settings",
"description": "App-Einstellungen öffnen",
"url": "/settings",
"icons": [
{
"src": "/icons/icon.svg",
"sizes": "any",
"type": "image/svg+xml"
}
]
}
],
"screenshots": [],
"prefer_related_applications": false
}

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<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Offline - Todo</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
padding: 1rem;
}
@media (prefers-color-scheme: dark) {
body {
background: linear-gradient(135deg, #1e1b2e 0%, #2d2640 100%);
color: #f3f4f6;
}
}
.container {
text-align: center;
max-width: 400px;
padding: 2rem;
background: rgba(255, 255, 255, 0.9);
border-radius: 1.5rem;
box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
backdrop-filter: blur(20px);
}
@media (prefers-color-scheme: dark) {
.container {
background: rgba(30, 27, 46, 0.9);
border: 1px solid rgba(255, 255, 255, 0.1);
}
}
.icon {
width: 80px;
height: 80px;
margin: 0 auto 1.5rem;
background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
border-radius: 1rem;
display: flex;
align-items: center;
justify-content: center;
}
.icon svg {
width: 48px;
height: 48px;
color: white;
}
h1 {
font-size: 1.5rem;
font-weight: 600;
color: #1f2937;
margin-bottom: 0.75rem;
}
@media (prefers-color-scheme: dark) {
h1 {
color: #f3f4f6;
}
}
p {
color: #6b7280;
margin-bottom: 1.5rem;
line-height: 1.6;
}
@media (prefers-color-scheme: dark) {
p {
color: #9ca3af;
}
}
.status {
display: flex;
align-items: center;
justify-content: center;
gap: 0.5rem;
padding: 0.75rem 1rem;
background: rgba(239, 68, 68, 0.1);
border-radius: 9999px;
color: #ef4444;
font-size: 0.875rem;
margin-bottom: 1.5rem;
}
.status-dot {
width: 8px;
height: 8px;
background: #ef4444;
border-radius: 50%;
animation: pulse 2s infinite;
}
@keyframes pulse {
0%, 100% { opacity: 1; }
50% { opacity: 0.5; }
}
button {
display: inline-flex;
align-items: center;
gap: 0.5rem;
padding: 0.75rem 1.5rem;
background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
color: white;
border: none;
border-radius: 9999px;
font-size: 0.875rem;
font-weight: 500;
cursor: pointer;
transition: transform 0.15s, box-shadow 0.15s;
}
button:hover {
transform: translateY(-2px);
box-shadow: 0 10px 20px -10px rgba(139, 92, 246, 0.5);
}
button:active {
transform: translateY(0);
}
.tips {
margin-top: 2rem;
padding-top: 1.5rem;
border-top: 1px solid rgba(0, 0, 0, 0.1);
text-align: left;
}
@media (prefers-color-scheme: dark) {
.tips {
border-top-color: rgba(255, 255, 255, 0.1);
}
}
.tips h2 {
font-size: 0.75rem;
text-transform: uppercase;
letter-spacing: 0.05em;
color: #9ca3af;
margin-bottom: 0.75rem;
}
.tips ul {
list-style: none;
font-size: 0.875rem;
color: #6b7280;
}
@media (prefers-color-scheme: dark) {
.tips ul {
color: #9ca3af;
}
}
.tips li {
display: flex;
align-items: center;
gap: 0.5rem;
margin-bottom: 0.5rem;
}
.tips li::before {
content: '•';
color: #8b5cf6;
}
</style>
</head>
<body>
<div class="container">
<div class="icon">
<svg fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
d="M18.364 5.636a9 9 0 010 12.728m0 0l-2.829-2.829m2.829 2.829L21 21M15.536 8.464a5 5 0 010 7.072m0 0l-2.829-2.829m-4.243 2.829a4.978 4.978 0 01-1.414-2.83m-1.414 5.658a9 9 0 01-2.167-9.238m7.824 2.167a1 1 0 111.414 1.414m-1.414-1.414L3 3m8.293 8.293l1.414 1.414" />
</svg>
</div>
<h1>Du bist offline</h1>
<p>Keine Internetverbindung. Sobald du wieder online bist, kannst du deine Aufgaben verwalten.</p>
<div class="status">
<span class="status-dot"></span>
<span>Verbindung wird gesucht...</span>
</div>
<button onclick="location.reload()">
<svg width="16" height="16" fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
</svg>
Erneut versuchen
</button>
<div class="tips">
<h2>Was du tun kannst</h2>
<ul>
<li>Überprüfe deine WLAN-Verbindung</li>
<li>Prüfe deine mobilen Daten</li>
<li>Versuche es in einigen Sekunden erneut</li>
</ul>
</div>
</div>
<script>
// Automatisch neu laden, wenn wieder online
window.addEventListener('online', () => {
location.reload();
});
</script>
</body>
</html>

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const CACHE_NAME = 'todo-v1';
const OFFLINE_URL = '/offline.html';
// Assets, die immer gecacht werden sollen
const STATIC_CACHE_URLS = ['/', '/offline.html', '/icons/icon.svg', '/manifest.json'];
// Cache-Strategien für verschiedene Ressourcen
const CACHE_STRATEGIES = {
// Netzwerk zuerst, dann Cache (für HTML/Navigation)
networkFirst: [/\/$/, /\.html$/, /^\/kanban/, /^\/settings/, /^\/mana/, /^\/feedback/],
// Cache zuerst, dann Netzwerk (für Assets)
cacheFirst: [
/\.css$/,
/\.js$/,
/\.woff2?$/,
/\.ttf$/,
/\.otf$/,
/\.svg$/,
/\.png$/,
/\.jpg$/,
/\.jpeg$/,
/\.webp$/,
/\.ico$/,
/\/_app\//,
],
// Nur Netzwerk (für API-Calls)
networkOnly: [/\/api\//, /localhost:3018/],
};
// Service Worker Installation
self.addEventListener('install', (event) => {
event.waitUntil(
caches
.open(CACHE_NAME)
.then((cache) => {
console.log('Todo Service Worker: Caching static assets');
return cache.addAll(STATIC_CACHE_URLS);
})
.then(() => self.skipWaiting())
);
});
// Service Worker Aktivierung
self.addEventListener('activate', (event) => {
event.waitUntil(
caches
.keys()
.then((cacheNames) => {
return Promise.all(
cacheNames
.filter((cacheName) => cacheName.startsWith('todo-') && cacheName !== CACHE_NAME)
.map((cacheName) => caches.delete(cacheName))
);
})
.then(() => self.clients.claim())
);
});
// Fetch-Event Handler
self.addEventListener('fetch', (event) => {
const { request } = event;
const url = new URL(request.url);
// Ignoriere Chrome Extension Requests
if (url.protocol === 'chrome-extension:') {
return;
}
// Ignoriere Cross-Origin Requests (z.B. Backend API)
if (url.origin !== self.location.origin) {
return;
}
// Bestimme die Cache-Strategie
const strategy = getStrategy(url.pathname);
if (strategy === 'networkFirst') {
event.respondWith(networkFirst(request));
} else if (strategy === 'cacheFirst') {
event.respondWith(cacheFirst(request));
} else if (strategy === 'networkOnly') {
event.respondWith(networkOnly(request));
} else {
// Standard: Network First
event.respondWith(networkFirst(request));
}
});
// Cache-Strategien Implementierung
async function networkFirst(request) {
try {
const networkResponse = await fetch(request);
if (networkResponse.ok) {
const cache = await caches.open(CACHE_NAME);
cache.put(request, networkResponse.clone());
}
return networkResponse;
} catch (error) {
const cachedResponse = await caches.match(request);
if (cachedResponse) {
return cachedResponse;
}
// Wenn es eine Navigation ist und wir offline sind, zeige die Offline-Seite
if (request.mode === 'navigate') {
const offlineResponse = await caches.match(OFFLINE_URL);
if (offlineResponse) {
return offlineResponse;
}
}
throw error;
}
}
async function cacheFirst(request) {
const cachedResponse = await caches.match(request);
if (cachedResponse) {
return cachedResponse;
}
try {
const networkResponse = await fetch(request);
if (networkResponse.ok) {
const cache = await caches.open(CACHE_NAME);
cache.put(request, networkResponse.clone());
}
return networkResponse;
} catch (error) {
console.error('Todo SW: Fetch failed:', error);
throw error;
}
}
async function networkOnly(request) {
return fetch(request);
}
// Hilfsfunktion zur Bestimmung der Cache-Strategie
function getStrategy(pathname) {
for (const [strategy, patterns] of Object.entries(CACHE_STRATEGIES)) {
if (patterns.some((pattern) => pattern.test(pathname))) {
return strategy;
}
}
return 'networkFirst';
}
// Message Handler für Updates
self.addEventListener('message', (event) => {
if (event.data && event.data.type === 'SKIP_WAITING') {
self.skipWaiting();
}
});

792
docs/PWA_GUIDE.md Normal file
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# PWA Guide - Progressive Web Apps im Monorepo
Diese Anleitung beschreibt, wie eine bestehende Web-App in eine installierbare PWA (Progressive Web App) umgewandelt wird.
## Übersicht
Eine PWA benötigt folgende Komponenten:
| Komponente | Datei | Zweck |
|------------|-------|-------|
| Web App Manifest | `static/manifest.json` | App-Metadaten, Icons, Shortcuts |
| Service Worker | `static/sw.js` | Offline-Support, Caching |
| Offline-Seite | `static/offline.html` | Fallback wenn offline |
| App-Icons | `static/icons/` | Icons für verschiedene Plattformen |
| Meta-Tags | `src/app.html` | PWA-Konfiguration im HTML |
| SW Registration | `+layout.svelte` | Service Worker starten |
---
## Schritt 1: App-Icons erstellen
### Verzeichnis anlegen
```
static/icons/
├── icon.svg # Basis-Icon (SVG, skalierbar)
├── icon-72x72.png # Optional: PNG für ältere Browser
├── icon-96x96.png
├── icon-128x128.png
├── icon-144x144.png
├── icon-152x152.png
├── icon-192x192.png
├── icon-384x384.png
├── icon-512x512.png
└── apple-touch-icon.png # 180x180 für iOS
```
### SVG-Icon Vorlage
SVG ist ideal, da es skalierbar ist und nur eine Datei benötigt:
```svg
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
<defs>
<linearGradient id="grad" x1="0%" y1="0%" x2="100%" y2="100%">
<stop offset="0%" style="stop-color:#8b5cf6"/>
<stop offset="100%" style="stop-color:#7c3aed"/>
</linearGradient>
</defs>
<rect width="512" height="512" rx="96" fill="url(#grad)"/>
<!-- App-spezifisches Icon hier -->
</svg>
```
### Farbschema pro App
| App | Primary Color | Gradient |
|-----|---------------|----------|
| Todo | `#8b5cf6` | `#8b5cf6``#7c3aed` |
| Chat | `#3b82f6` | `#3b82f6``#2563eb` |
| Picture | `#ec4899` | `#ec4899``#db2777` |
| Zitare | `#f59e0b` | `#f59e0b``#d97706` |
| Calendar | `#10b981` | `#10b981``#059669` |
| Contacts | `#6366f1` | `#6366f1``#4f46e5` |
| Mana Games | `#00ff88` | `#00ff88``#00cc6a` |
---
## Schritt 2: Web App Manifest
### Datei: `static/manifest.json`
```json
{
"name": "App Name - Beschreibung",
"short_name": "App Name",
"description": "Kurze Beschreibung der App",
"start_url": "/",
"display": "standalone",
"background_color": "#ffffff",
"theme_color": "#8b5cf6",
"orientation": "any",
"categories": ["productivity"],
"lang": "de",
"icons": [
{
"src": "/icons/icon.svg",
"sizes": "any",
"type": "image/svg+xml",
"purpose": "any"
},
{
"src": "/icons/icon-192x192.png",
"sizes": "192x192",
"type": "image/png"
},
{
"src": "/icons/icon-512x512.png",
"sizes": "512x512",
"type": "image/png"
}
],
"shortcuts": [
{
"name": "Shortcut Name",
"short_name": "Kurz",
"description": "Beschreibung",
"url": "/path?action=shortcut",
"icons": [
{
"src": "/icons/icon-96x96.png",
"sizes": "96x96"
}
]
}
]
}
```
### Manifest-Felder erklärt
| Feld | Beschreibung | Beispiel |
|------|--------------|----------|
| `name` | Vollständiger App-Name | "Todo - Aufgabenverwaltung" |
| `short_name` | Kurzname (max 12 Zeichen) | "Todo" |
| `description` | App-Beschreibung | "Aufgaben verwalten" |
| `start_url` | Start-URL beim Öffnen | "/" |
| `display` | Anzeigemodus | "standalone", "fullscreen", "minimal-ui" |
| `background_color` | Hintergrund beim Laden | "#ffffff" |
| `theme_color` | Statusleisten-Farbe | "#8b5cf6" |
| `orientation` | Bildschirmorientierung | "any", "portrait", "landscape" |
| `categories` | App Store Kategorien | ["productivity", "utilities"] |
| `lang` | Sprache | "de" |
| `icons` | App-Icons Array | Siehe oben |
| `shortcuts` | Quick Actions | Siehe oben |
### Display-Modi
| Modus | Beschreibung |
|-------|--------------|
| `fullscreen` | Komplett bildschirmfüllend, keine Browser-UI |
| `standalone` | Wie native App, mit Statusleiste |
| `minimal-ui` | Mit minimaler Browser-Navigation |
| `browser` | Normaler Browser-Tab |
---
## Schritt 3: Service Worker
### Datei: `static/sw.js`
```javascript
const CACHE_NAME = 'app-name-v1';
const OFFLINE_URL = '/offline.html';
// Statische Assets die immer gecacht werden
const STATIC_CACHE_URLS = [
'/',
'/offline.html',
'/icons/icon.svg',
'/manifest.json'
];
// Cache-Strategien für verschiedene Ressourcen
const CACHE_STRATEGIES = {
// Network First: Immer aktuell, Cache als Fallback
networkFirst: [
/\/$/, // Root
/\.html$/, // HTML-Dateien
/^\/app/, // App-Routen
],
// Cache First: Schnell laden, im Hintergrund aktualisieren
cacheFirst: [
/\.css$/,
/\.js$/,
/\.woff2?$/,
/\.ttf$/,
/\.svg$/,
/\.png$/,
/\.jpg$/,
/\.jpeg$/,
/\.webp$/,
/\/_app\//, // SvelteKit Assets
],
// Network Only: Nie cachen (API-Calls)
networkOnly: [
/\/api\//,
/localhost:\d+/,
]
};
// Installation
self.addEventListener('install', (event) => {
event.waitUntil(
caches.open(CACHE_NAME)
.then((cache) => {
console.log('SW: Caching static assets');
return cache.addAll(STATIC_CACHE_URLS);
})
.then(() => self.skipWaiting())
);
});
// Aktivierung (alte Caches löschen)
self.addEventListener('activate', (event) => {
event.waitUntil(
caches.keys()
.then((cacheNames) => {
return Promise.all(
cacheNames
.filter((name) => name.startsWith('app-name-') && name !== CACHE_NAME)
.map((name) => caches.delete(name))
);
})
.then(() => self.clients.claim())
);
});
// Fetch-Handler
self.addEventListener('fetch', (event) => {
const { request } = event;
const url = new URL(request.url);
// Chrome Extensions ignorieren
if (url.protocol === 'chrome-extension:') return;
// Cross-Origin ignorieren
if (url.origin !== self.location.origin) return;
const strategy = getStrategy(url.pathname);
if (strategy === 'networkFirst') {
event.respondWith(networkFirst(request));
} else if (strategy === 'cacheFirst') {
event.respondWith(cacheFirst(request));
} else if (strategy === 'networkOnly') {
event.respondWith(fetch(request));
} else {
event.respondWith(networkFirst(request));
}
});
// Network First Strategy
async function networkFirst(request) {
try {
const response = await fetch(request);
if (response.ok) {
const cache = await caches.open(CACHE_NAME);
cache.put(request, response.clone());
}
return response;
} catch (error) {
const cached = await caches.match(request);
if (cached) return cached;
// Offline-Seite für Navigation
if (request.mode === 'navigate') {
const offline = await caches.match(OFFLINE_URL);
if (offline) return offline;
}
throw error;
}
}
// Cache First Strategy
async function cacheFirst(request) {
const cached = await caches.match(request);
if (cached) return cached;
try {
const response = await fetch(request);
if (response.ok) {
const cache = await caches.open(CACHE_NAME);
cache.put(request, response.clone());
}
return response;
} catch (error) {
console.error('SW: Fetch failed:', error);
throw error;
}
}
// Strategie ermitteln
function getStrategy(pathname) {
for (const [strategy, patterns] of Object.entries(CACHE_STRATEGIES)) {
if (patterns.some((pattern) => pattern.test(pathname))) {
return strategy;
}
}
return 'networkFirst';
}
// Update-Nachricht empfangen
self.addEventListener('message', (event) => {
if (event.data?.type === 'SKIP_WAITING') {
self.skipWaiting();
}
});
```
### Caching-Strategien erklärt
| Strategie | Wann verwenden | Verhalten |
|-----------|----------------|-----------|
| **Network First** | HTML, dynamische Inhalte | Versucht Netzwerk, fällt auf Cache zurück |
| **Cache First** | Statische Assets (CSS, JS, Bilder) | Lädt aus Cache, aktualisiert im Hintergrund |
| **Network Only** | API-Calls, Echtzeit-Daten | Kein Caching, immer Netzwerk |
| **Stale While Revalidate** | Häufig aktualisierte Inhalte | Cache sofort, Netzwerk im Hintergrund |
### Cache-Versionierung
Bei Updates den Cache-Namen erhöhen:
```javascript
// Version erhöhen bei Breaking Changes
const CACHE_NAME = 'app-name-v2'; // War v1
```
---
## Schritt 4: Offline-Seite
### Datei: `static/offline.html`
```html
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Offline - App Name</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
padding: 1rem;
}
@media (prefers-color-scheme: dark) {
body {
background: linear-gradient(135deg, #1e1b2e 0%, #2d2640 100%);
color: #f3f4f6;
}
}
.container {
text-align: center;
max-width: 400px;
padding: 2rem;
background: rgba(255, 255, 255, 0.9);
border-radius: 1.5rem;
box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
backdrop-filter: blur(20px);
}
@media (prefers-color-scheme: dark) {
.container {
background: rgba(30, 27, 46, 0.9);
border: 1px solid rgba(255, 255, 255, 0.1);
}
}
.icon {
width: 80px;
height: 80px;
margin: 0 auto 1.5rem;
background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
border-radius: 1rem;
display: flex;
align-items: center;
justify-content: center;
}
.icon svg {
width: 48px;
height: 48px;
color: white;
}
h1 {
font-size: 1.5rem;
font-weight: 600;
color: #1f2937;
margin-bottom: 0.75rem;
}
@media (prefers-color-scheme: dark) {
h1 { color: #f3f4f6; }
}
p {
color: #6b7280;
margin-bottom: 1.5rem;
line-height: 1.6;
}
@media (prefers-color-scheme: dark) {
p { color: #9ca3af; }
}
.status {
display: flex;
align-items: center;
justify-content: center;
gap: 0.5rem;
padding: 0.75rem 1rem;
background: rgba(239, 68, 68, 0.1);
border-radius: 9999px;
color: #ef4444;
font-size: 0.875rem;
margin-bottom: 1.5rem;
}
.status-dot {
width: 8px;
height: 8px;
background: #ef4444;
border-radius: 50%;
animation: pulse 2s infinite;
}
@keyframes pulse {
0%, 100% { opacity: 1; }
50% { opacity: 0.5; }
}
button {
display: inline-flex;
align-items: center;
gap: 0.5rem;
padding: 0.75rem 1.5rem;
background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
color: white;
border: none;
border-radius: 9999px;
font-size: 0.875rem;
font-weight: 500;
cursor: pointer;
transition: transform 0.15s, box-shadow 0.15s;
}
button:hover {
transform: translateY(-2px);
box-shadow: 0 10px 20px -10px rgba(139, 92, 246, 0.5);
}
button:active {
transform: translateY(0);
}
</style>
</head>
<body>
<div class="container">
<div class="icon">
<svg fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
d="M18.364 5.636a9 9 0 010 12.728m0 0l-2.829-2.829m2.829 2.829L21 21M15.536 8.464a5 5 0 010 7.072m0 0l-2.829-2.829m-4.243 2.829a4.978 4.978 0 01-1.414-2.83m-1.414 5.658a9 9 0 01-2.167-9.238m7.824 2.167a1 1 0 111.414 1.414m-1.414-1.414L3 3m8.293 8.293l1.414 1.414" />
</svg>
</div>
<h1>Du bist offline</h1>
<p>Keine Internetverbindung. Sobald du wieder online bist, kannst du die App nutzen.</p>
<div class="status">
<span class="status-dot"></span>
<span>Verbindung wird gesucht...</span>
</div>
<button onclick="location.reload()">
<svg width="16" height="16" fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
</svg>
Erneut versuchen
</button>
</div>
<script>
// Automatisch neu laden wenn wieder online
window.addEventListener('online', () => {
location.reload();
});
</script>
</body>
</html>
```
---
## Schritt 5: PWA Meta-Tags
### Datei: `src/app.html`
Im `<head>` hinzufügen:
```html
<!doctype html>
<html lang="de">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<!-- Favicon -->
<link rel="icon" href="%sveltekit.assets%/favicon.png" />
<link rel="icon" type="image/svg+xml" href="/icons/icon.svg" />
<!-- PWA Manifest -->
<link rel="manifest" href="/manifest.json" />
<!-- Theme Color -->
<meta name="theme-color" content="#8b5cf6" />
<meta name="msapplication-TileColor" content="#8b5cf6" />
<!-- Apple iOS PWA -->
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="apple-mobile-web-app-title" content="App Name" />
<link rel="apple-touch-icon" href="/icons/icon.svg" />
<!-- Microsoft Tiles -->
<meta name="msapplication-config" content="none" />
%sveltekit.head%
</head>
<body data-sveltekit-preload-data="hover">
<div style="display: contents">%sveltekit.body%</div>
</body>
</html>
```
### Meta-Tags erklärt
| Tag | Zweck |
|-----|-------|
| `<link rel="manifest">` | Verlinkt das Web App Manifest |
| `<meta name="theme-color">` | Farbe der Browser-Statusleiste |
| `apple-mobile-web-app-capable` | Ermöglicht "Add to Home Screen" auf iOS |
| `apple-mobile-web-app-status-bar-style` | iOS Statusleisten-Stil |
| `apple-mobile-web-app-title` | App-Name auf iOS Homescreen |
| `apple-touch-icon` | Icon für iOS Homescreen |
| `msapplication-TileColor` | Windows Tile Farbe |
---
## Schritt 6: Service Worker Registration
### Datei: `src/routes/(app)/+layout.svelte`
Im `onMount` hinzufügen:
```typescript
import { onMount } from 'svelte';
onMount(async () => {
// ... andere Initialisierungen ...
// Service Worker registrieren
if ('serviceWorker' in navigator) {
try {
const registration = await navigator.serviceWorker.register('/sw.js', {
scope: '/',
});
console.log('PWA: Service Worker registered', registration.scope);
// Update-Erkennung
registration.addEventListener('updatefound', () => {
const newWorker = registration.installing;
if (newWorker) {
newWorker.addEventListener('statechange', () => {
if (newWorker.state === 'installed' && navigator.serviceWorker.controller) {
// Neue Version verfügbar
console.log('PWA: New version available');
// Optional: Benutzer informieren
showUpdateNotification();
}
});
}
});
} catch (error) {
console.error('PWA: Service Worker registration failed', error);
}
}
});
function showUpdateNotification() {
// Optional: Toast/Banner anzeigen
// "Neue Version verfügbar - Seite neu laden?"
}
```
---
## Schritt 7: Optionale Features
### Install-Prompt anzeigen
```typescript
let deferredPrompt: BeforeInstallPromptEvent | null = null;
let showInstallButton = $state(false);
onMount(() => {
window.addEventListener('beforeinstallprompt', (e) => {
e.preventDefault();
deferredPrompt = e as BeforeInstallPromptEvent;
showInstallButton = true;
});
window.addEventListener('appinstalled', () => {
showInstallButton = false;
deferredPrompt = null;
});
});
async function installApp() {
if (!deferredPrompt) return;
deferredPrompt.prompt();
const { outcome } = await deferredPrompt.userChoice;
if (outcome === 'accepted') {
console.log('PWA installed');
}
deferredPrompt = null;
showInstallButton = false;
}
```
```svelte
{#if showInstallButton}
<button onclick={installApp}>
App installieren
</button>
{/if}
```
### Update-Banner
```svelte
<script lang="ts">
let showUpdateBanner = $state(false);
let waitingWorker: ServiceWorker | null = null;
function handleUpdate() {
if (waitingWorker) {
waitingWorker.postMessage({ type: 'SKIP_WAITING' });
}
window.location.reload();
}
</script>
{#if showUpdateBanner}
<div class="update-banner">
<span>Neue Version verfügbar</span>
<button onclick={handleUpdate}>Aktualisieren</button>
</div>
{/if}
```
### Offline-Status anzeigen
```svelte
<script lang="ts">
let isOnline = $state(navigator.onLine);
onMount(() => {
window.addEventListener('online', () => isOnline = true);
window.addEventListener('offline', () => isOnline = false);
});
</script>
{#if !isOnline}
<div class="offline-indicator">
Offline
</div>
{/if}
```
---
## Checkliste
### Vor dem Deployment
- [ ] `manifest.json` erstellt mit korrekten Metadaten
- [ ] App-Icons in allen benötigten Größen vorhanden
- [ ] `sw.js` erstellt mit passenden Cache-Strategien
- [ ] `offline.html` erstellt mit App-Branding
- [ ] PWA Meta-Tags in `app.html` eingefügt
- [ ] Service Worker Registration im Layout
- [ ] Theme-Color passt zur App
- [ ] `start_url` ist korrekt
- [ ] Shortcuts sind sinnvoll definiert
### Testen
```bash
# Chrome DevTools
1. F12 öffnen
2. Application Tab
3. "Manifest" prüfen
4. "Service Workers" prüfen
5. "Cache Storage" prüfen
# Lighthouse Audit
1. F12 öffnen
2. Lighthouse Tab
3. "Progressive Web App" aktivieren
4. "Analyze page load" klicken
```
### PWA-Kriterien (Lighthouse)
| Kriterium | Anforderung |
|-----------|-------------|
| Installierbar | Manifest + Service Worker |
| Offline-fähig | Service Worker mit Caching |
| HTTPS | Erforderlich (außer localhost) |
| Responsive | Viewport Meta-Tag |
| Schnell | First Contentful Paint < 3s |
---
## Referenz-Implementierungen
### Im Monorepo
| App | Verzeichnis |
|-----|-------------|
| Mana Games | `games/mana-games/apps/web/public/` |
| Todo | `apps/todo/apps/web/static/` |
### Externe Ressourcen
- [Web.dev PWA Guide](https://web.dev/progressive-web-apps/)
- [MDN Web App Manifest](https://developer.mozilla.org/en-US/docs/Web/Manifest)
- [Workbox (Google's SW Library)](https://developer.chrome.com/docs/workbox/)
---
## Troubleshooting
### Service Worker wird nicht registriert
```
Fehler: "Service Worker registration failed"
```
**Lösungen:**
1. HTTPS verwenden (oder localhost)
2. Pfad zu `sw.js` prüfen (muss im root sein)
3. Browser-Cache leeren
4. DevTools → Application → Service Workers → "Update on reload" aktivieren
### Manifest wird nicht erkannt
```
Fehler: "No matching service worker detected"
```
**Lösungen:**
1. `<link rel="manifest">` im `<head>` prüfen
2. JSON-Syntax in `manifest.json` validieren
3. Icons-Pfade prüfen
### Offline-Seite wird nicht angezeigt
**Lösungen:**
1. `offline.html` ist in `STATIC_CACHE_URLS` enthalten
2. Service Worker ist aktiviert
3. Cache-Name stimmt überein
### App lässt sich nicht installieren
**Voraussetzungen:**
1. HTTPS (oder localhost)
2. Gültiges Manifest mit `name`, `icons`, `start_url`, `display`
3. Service Worker registriert
4. Icon mindestens 192x192px