midPWA
How do offline fallback strategies work?
Updated May 17, 2026
Short answer
Fallback pages are shown when resources are unavailable.
Deep explanation
Service Workers intercept failed requests and serve cached fallback HTML or UI.
Real-world example
Offline error pages in banking apps.
Common mistakes
- Not caching fallback pages.
Follow-up questions
- What should fallback contain?
- Is fallback always required?