Type Signature · #48 · 2026-05-22
What happens when you compile this?
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.
function choose<T>(options: T[], defaultOpt: NoInfer<T>): T {
return defaultOpt;
}
const r = choose(['a', 'b', 'c'], 'd');
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Press 1 through 4, or tap a numbered choice, to answer. Back to hub