How does code splitting interact with route-based chunks in Next.js?
PICTURE THIS: DJANGO MVT
Simple meaning
Each route becomes its own JS payload plus shared vendors.
WHY — Performance instead of guessing?
Why interviewers care about Performance:
question about Performance.
trade-offs, and what you would actually do on a Frontend project - not buzzwords.
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:
- 1Each route becomes its
own JS payload plus shared vendors.
- 2Prefetch on link hover
can hide the cost of the next page.
- 3I watch for duplicate
big libraries in many chunks and move them to a shared layout or dynamic import with ssr false only when needed.
- 4Give an example
One tiny concrete case you can say aloud.
- 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
Each route becomes its own JS payload plus shared vendors. Prefetch on link hover can hide the cost of the next page.