Browser & Web Performance · Middle · Question 43 of 75
What does must-revalidate add to a cached response?
- ✓Correct answer: Once stale, it must not be used without successful revalidation, even if the server is unreachable
- 2It must be revalidated on every request, even while fresh
- 3It allows serving stale content on errors
Explanation
Without it, caches may serve stale content in some cases (e.g. when disconnected). It doesn't affect fresh responses.