sindresorhus/type-fest

KeysOfType

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#630 opened on Jun 5, 2023

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 (3 comments) (2 reactions) (0 assignees)TypeScript (471 forks)batch import
help wantedtype addition

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Description

  type KeysOfType<T, U> = {
    [K in keyof T]: T[K] extends U ? K : never;
  }[keyof T];

Contributor guide

Research direction
Review the type definition and ensure it works as expected; consider adding unit tests.
Tech stack
typescript
Domain
developer experience
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
TypeScript
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
90