Why put a CDN in front of a React production build?
PICTURE THIS: HASH MAP
Simple meaning
A CDN caches JS, CSS, and images at the edge so users download them from a nearby location.
WHY — Caching instead of guessing?
Why interviewers care about Caching:
on Caching.
the situation, the default choice, and one exception - that reads as experience.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1A CDN caches JS,
CSS, and images at the edge so users download them from a nearby location.
- 2Hashed filenames let you
cache forever and bust cache on each deploy.
- 3The API still needs
its own scaling story
- 4a CDN does not
replace Express.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
A CDN caches JS, CSS, and images at the edge so users download them from a nearby location. Hashed filenames let you cache forever and bust cache on each deploy.