What does Parameters void> return?

TypeScript · Middle · Question 35 of 75

What does `Parameters<(a: string, b?: number) => void>` return?

✓Correct answer: [a: string, b?: number]
2string | number
3{ a: string; b?: number }

Explanation

Parameters returns a tuple of parameters, preserving optionality and names. Handy for wrappers: function logged(...args: Parameters<typeof fn>). For constructors there's ConstructorParameters.

What does `Parameters<(a: string, b?: number) => void>` return?

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What does Parameters<(a: string, b?: number) => void> return?

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What does `Parameters<(a: string, b?: number) => void>` return?