How does the prototype of an ES6 class relate to constructor functions?
PICTURE THIS: HOW TO EXPLAIN IT
Simple meaning
Class Foo still has Foo.prototype and instances link to it.
WHY — JavaScript instead of guessing?
Why interviewers care about JavaScript:
question about JavaScript.
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:
- 1Class Foo still has
Foo.prototype and instances link to it.
- 2Methods are non-enumerable on
the prototype
- 3the constructor property points
back to Foo.
- 4Super walks that chain,
which is why forgetting new or calling a class as a function throws.
- 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
Class Foo still has Foo.prototype and instances link to it. Methods are non-enumerable on the prototype