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TypeScript Aliases

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Ariful Islam Adil(Code Lover) answered on December 31, 2021 Popularity 9/10 Helpfulness 1/10

answer TypeScript Aliases

related type alias in typescript

related type aliases can only be used in typescript files

TypeScript Aliases

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type alphanumeric = string | number;
let input: alphanumeric;
input = 100; // valid
input = 'Hi'; // valid
input = false; // Compiler error
Code language: JavaScript (javascript)

Popularity 9/10 Helpfulness 1/10 Language whatever

Source: www.typescripttutorial.net

Tags: aliases typescript whatever

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Contributed on Jan 27 2024

Ariful Islam Adil(Code Lover)

0 Answers Avg Quality 2/10

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type alias in typescript

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type StringAlias = string;
type NumberAlias = number;
// aliases for 'normal' types

type SixAlias = 6;         
type MyFavouriteFood = "burger"; 
// aliases for 'literal' types
// these are usually useless on their own

type Food = MyFavouriteFood | "pizza" | "pasta" | "salad";
// they get useful when you combine them:
// a Food can be one of these choices.

type Foods = Food[];
// this is an alias for an array of Foods.

type SuccessfulResponse = {
	message: string,
  	statusCode: number,
  	attachment?: string,
	preferredFoods?: Foods,
}                          
// Now we define a SuccessfulResponse type as the type of a
// JS literal object with two required and two optional attributes.
// Note that you could also use an interface in this case.

type SuccessfulResponseHandler = (res: SuccessfulResponse) => void;
// This is a type alias for a function.


// tl;dr: You can alias every type in TypeScript and chain them.
// This is very useful for reusability and readability.

Popularity 10/10 Helpfulness 3/10 Language typescript

Source: Grepper

Tags: type-alias t

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Contributed on Dec 31 2021

Leo

0 Answers Avg Quality 2/10

type aliases can only be used in typescript files

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check the file extention and change it to .ts/tsx format

Popularity 10/10 Helpfulness 1/10 Language typescript

Source: Grepper

Tags: typescript t

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Contributed on Nov 16 2022

siam88

0 Answers Avg Quality 2/10

TypeScript Aliases

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TypeScript Aliases

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type alias in typescript

type aliases can only be used in typescript files

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