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Typescript
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Typescript · Interview Question

infer is used to…

Detailed answer, explanation and code for this interview question. Ideal for Typescript interview preparation, coding rounds and viva questions.

Difficulty: MediumType: MCQ

Question Overview

Subject

Typescript

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Asked in Companies

Google

Microsoft Amazon

Problem Statement

infer is used to…

Explanation

“infer” lets you pull out a type part from the left side of a conditional. Think: pattern-match a type and bind the inner piece.

Code Solution

SolutionRead Only

type UnwrapPromise<T> = T extends Promise<infer U> ? U : T;
type X = UnwrapPromise<Promise<number>>; // number

Practice Sets

This question appears in the following practice sets:

Generics & Conditionals

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infer is used to… - Typescript | Preplance Interview Prep | Preplance

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infer is used to…

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

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unknown is best described as…

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Choose the correct explicit variable declaration:

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Master Interviews Anywhere, Anytime

infer is used to…

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which are primitive types in TypeScript?

unknown is best described as…

never typically represents…

Which compiler flag primarily prevents implicit any?

Choose the correct explicit variable declaration:

More from Typescript

Master Interviews
Anywhere, Anytime