Utility Types

These are a set of utility types that I use in my projects.

Installation

npm

npm install -D @greenymcgee/utility-types

pnpm

pnpm add -D @greenymcgee/utility-types

Usage

Add this to your project's tsconfig.json file.

"compilerOptions": {
  "types": ["@greenymcgee/utility-types"]
}

Types

FirstParameterOf

Used to get the first parameter of a function.

type YourType = FirstParameterOf<typeof yourFunction>

SecondParameterOf

Used to get the second parameter of a function.

type YourType = SecondParameterOf<typeof yourFunction>

ThirdParameterOf

Used to get the third parameter of a function.

type YourType = ThirdParameterOf<typeof yourFunction>

PropsOf

Used to get the props of a component.

type YourProps = PropsOf<typeof YourComponent>

OneOf

Used to get the first element of an array. Very useful if you have an array of typed objects, but don't need a type for the objects themselves.

type YourType = OneOf<typeof yourArray>