TypeScript

How to define unexported type which come from library

How to use cheerio.Root type in TypeScript

• return type of a function: ReturnType

import cheerio, { load } from 'cheerio';

type CheerioRoot = ReturnType<typeof load>;

• type of a parameter: Parameters

function foo(a: number, b: string) {
  // Do Something
}

type FooFirstParameterType = Parameters<typeof foo>[0]; // number
type FooSecondParameterType = Parameters<typeof foo>[1]; // string

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