What is Progressive Web App (PWA)?
A website built with modern web capabilities that behaves like an installed native application, featuring offline caching, instant home-screen installation, and background sync.
The Service Worker Proxy Layer
A PWA registers a background Service Worker that intercepts network fetch events. When an asset (like DocSwift's WebAssembly PDF engine) is requested, the service worker serves it directly from the local Cache Storage API.
Combined with a `manifest.json` file defining app icons and theme colors, users can install the web app to their Windows, macOS, iOS, or Android home screen with zero app store friction.
Key Advantages & Impact
- Operates completely offline without requiring an active internet connection
- Eliminates 30% Apple/Google App Store commissions and tedious review delays
- Instant loading via precached static assets, achieving 100/100 Lighthouse performance
Common Misconceptions vs Reality
Experience This Technology in DocSwift Tools
Frequently Asked Questions
Does DocSwift work as a PWA?
Yes! DocSwift includes an active service worker and manifest, allowing you to install it as a standalone offline desktop application.
Do PWAs take up storage on my phone?
Only a fraction of native apps. PWAs typically occupy less than 5-10 megabytes of browser cache storage.