References

APIs & Specifications

API / Spec	Description	Status
Service Workers	Background script for offline, caching, push	W3C Candidate Recommendation
Web App Manifest	App metadata for installation	W3C Recommendation
Cache API	Request/Response pair storage	W3C Candidate Recommendation
IndexedDB	Client-side NoSQL database	W3C Recommendation
Push API	Server push to service workers	W3C Candidate Recommendation
Notification API	System notifications	W3C Recommendation
Background Sync	Deferred sync on connectivity	W3C Working Draft
Web Share API	Share content to other apps	W3C Candidate Recommendation
Share Target API	Receive shared content	W3C Draft Community Group
Badging API	App icon badges	W3C Candidate Recommendation
File System Access	Read/write local files	W3C Draft
Window Controls Overlay	Custom title bar in installed PWAs	W3C Draft

Essential Tools

Chrome DevTools: Application panel for PWA debugging
Lighthouse: Automated PWA auditing
Workbox: Service Worker library by Google
PWA Builder: PWA packaging for app stores
Webhint: Web best practices linting
Puppeteer: Browser automation for testing
Vite PWA Plugin: Zero-config PWA setup
PWABuilder.com: PWA analysis and packaging
Maskable.app: Create maskable icons
Realfavicongenerator: Generate all platform icons

Useful Resources

web.dev/progressive-web-apps: Google's official PWA learning path
developer.mozilla.org - PWA: MDN's comprehensive PWA documentation
whatpwacando.today: Live demos of PWA capabilities
pwastats.com: Browser support tracking for PWA features
web.dev/learn/pwa: Google's structured PWA course
w3c.github.io/manifest/: W3C Web App Manifest specification
w3c.org/TR/service-workers: W3C Service Worker specification
chromestatus.com: Chrome platform status for web features
caniuse.com: Browser compatibility tables
github.com/GoogleChromeLabs: Google Chrome Labs on GitHub

Community

Stack Overflow: #progressive-web-apps tag
Chromium Blog: Latest PWA news from Chrome team
Web.dev Discord: Community discussions
Flig-PWA: Spanish PWA community
Open Web Docs: Web documentation community

Final Note

The web is the most powerful platform we have. PWAs are the future of the web — they combine the reach of the web with the capabilities of native apps. Keep building, experiment with new APIs, and contribute to the web platform. The best is yet to come.