Q5: What are the differences between fallback: false, fallback: true, and fallback: 'blocking'?
fallback: false: Ungenerated paths return a 404 page.fallback: true: Serves a fallback page (router.isFallback) instantly, fetches data in the background, then swaps in content.fallback: 'blocking': SSRs the new page on the first request, pausing navigation until HTML is rendered, then caches it for future visits.
Key Takeaways
false: Strict 404 for missing paths.true: Shows fallback UI while generating in background.blocking: Server-renders on demand before sending response (no fallback spinner).
Knowledge Check
Which fallback setting blocks initial page delivery until full HTML is generated on the server for uncached paths?