TypeScript · Senior · Question 71 of 75

What problem can `strictNullChecks: false` in one package cause in a monorepo?

✓Correct answer: Types emitted from that package may omit null/undefined, giving consumers false guarantees
2It only affects that package's speed
3It makes builds fail everywhere

Explanation

Consistent strictness across packages, via a shared base config, prevents type information from being lost at boundaries.

Further reading

Test yourself

Take the TypeScript · Senior quiz: questions and options are shuffled, and you get a review of your mistakes at the end.