Type alias in typescript

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.

Similar codes

0 vote249 views1 answer
Fruits = ["apple", "banana", "cherry"] for x in fruits: print(x) if x == "banana": break Identify output ?
TypeScript
9 votes277 views3 answers
Fragments in react
TypeScript
2 votes258 views3 answers
Module not found: Error: Can't resolve 'core-js/es7/reflect'
TypeScript
3 votes271 views2 answers
How to compile typescript
TypeScript
3 votes269 views1 answer
Parsing error: "parserOptions.project" has been set for @typescript-eslint/parser.
TypeScript
1 vote250 views1 answer
Battle cats challenge battle
TypeScript
0 vote255 views1 answer
Nodejs to send authentication bearer token cowin
TypeScript
3 votes277 views1 answer
Redux toolkit typescript install
TypeScript
0 vote245 views1 answer
Custom validation for phone-number using class-validator package
TypeScript
0 vote259 views1 answer
Does i5 7th generation processor supports windows 11
TypeScript