Type Signature · #7 · 2026-04-11
What is type `X`?
TypeScript ·Difficulty 3/3
How to play
Read the TypeScript snippet and pick the correct type from four choices. Think about inference, narrowing, and utility types. Press 1–4 or click to answer.
type Unpacked<T> = T extends Array<infer U> ? U : T;
type X = Unpacked<string[]>;
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Press 1 through 4, or tap a numbered choice, to answer. Back to hub