Frontend · Mid-level · Theory

When do you use unknown instead of any in TypeScript, and how do you work with such a value afterwards?

~4 min by voice

How to approach it

This checks whether you understand the difference between switching type checking off (any) and an honest "the type is unknown" (unknown), and whether you can safely turn external data into typed data: with narrowing, type guards and runtime validation.

Have you seen this question in a real interview?

Answers0

Avg. score—

Strong—

Practiced0

Topics

typescript type narrowing

Answer by voice

The interviewer will ask this question and listen. Think out loud and ask for a hint if you need one. When you're done, pause or tap “That's my answer”. In about a minute, your score and the points you covered show up here.

Best with headphones · ~4 min