Parameter type from function TypeScript

Husnain Syed answered on December 3, 2020 Popularity 10/10 Helpfulness 3/10

answer Parameter type from function TypeScript

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Parameter type from function TypeScript

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//parameter
type Parameter<T extends (...args: any[]) => any> = T extends (...args: infer P) => any ? P : never;
type paraMeterCheck = Parameter<(a: string, b: string) => void>;

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Source: Grepper

Tags: function typescript

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Contributed on May 28 2022

Husnain Syed

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typescript function as parameter

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function createPerson(name: string, doAction: () => void): void {
  console.log(`Hi, my name is ${name}.`);
  doAction(); // doAction as a function parameter.
}

// Hi, my name is Bob.
// performs doAction which is waveHands function.
createPerson('Bob', waveHands());

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Contributed on Dec 03 2020

peachmangopie

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typescript arguments of function

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function doCoolStuff(a: string, b: number) {
  // ...
}

type DoCoolStuffArgs = Parameters<typeof doCoolStuff> // [string, number]

type SecondArg = Parameters<typeof doCoolStuff>[1] // number

// demo: https://www.typescriptlang.org/play/?#code/GYVwdgxgLglg9mABAEzgYTnANgZSiYYACgEMAuRAZygCcYwBzAGkQCMKwQBbVgUxoCUiAN4AoRIgD0kxADp5ogL6jRUAJ4AHXogAi6TLnyEAgjQaVEAXkQAFEjRJdeUfpQA86rXGAp92PATAAHxSMgDa1HSMLJw8-AC6KtKIAB6IABYkFp7aEbT0zIixfDTxLPTA-DS8yIjANHBciFDp2jkW3s2tiBr2js6uiJ2oGP5GwKIQCNSpZHqjhoGm5laIYQDk6TDrLACMAAyJoslqGVnNmtrF-OVglTTVtfWNXW2XQz4t2gBErN89fScLhoH18CwChEm0ygiDUZDsDiBrg8l2GfkWhCCYV28VWBySMhgMIA7nAaABrCxYGDktpbCznYm8LBYMiqd44XhTMDIZarBH9YHuHJo8HjLE4qFgGYALzInO5vLMeP2oiAA

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Source: stackoverflow.com

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Contributed on Jul 18 2024

Famous Flatworm

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Typescript Parameters type

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function add(a: number, b: string, c:boolean): string {
  return a + b;
}

type AddReturnType = Parameters<typeof add>;
// type AddReturnType = [a: number, b: string, c:boolean];

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Source: dev.to

Tags: parameters p

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Contributed on Apr 10 2023

Azizul7m

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Parameter type from function TypeScript

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