juniorPWA
What is caching in PWAs?
Updated May 17, 2026
Short answer
Caching stores resources locally for faster and offline access.
Deep explanation
PWAs use Cache API to store assets like HTML, CSS, JS, and images so that apps load quickly and work offline.
Real-world example
Google Maps caches map tiles for offline use.
Common mistakes
- Caching everything without versioning leading to stale data.
Follow-up questions
- What is Cache API?
- How is cache updated?