TypeScript · Senior · Question 70 of 75

How do you prevent consumers from depending on internal types of your library?

✓Correct answer: Expose a deliberate public API (entry points via exports), mark internals with @internal and strip them with tools like API Extractor
2Make all types any
3Put everything in one file

Explanation

Every exported type becomes part of the semver contract; a smaller surface makes changes safer.

Further reading

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