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 vote207 views1 answer
Extracts lists from list python
TypeScript
0 vote183 views1 answer
Highcharts turbothreshold not working
TypeScript
1 vote202 views1 answer
Mongodb array not equal to value
TypeScript
2 votes271 views1 answer
'mat-checkbox' is not a known element
TypeScript
0 vote207 views1 answer
Type 'string' is not assignable to type 'ArrayBufferLike'
TypeScript
0 vote196 views1 answer
Module '"@angular/fire/firestore"' has no exported member 'AngularFirestoreDocument'
TypeScript
29 votes212 views6 answers
Bootstrap angular
TypeScript
0 vote204 views1 answer
From __future__ import unicode_literals import youtube_dl ydl_opts = {} with youtube_dl.YoutubeDL(ydl_opts) as ydl: ydl.download(['VideoURL'])
TypeScript
2 votes200 views1 answer
Typescript calculate days between dates
TypeScript
0 vote204 views1 answer
Mat stepper dont clickable
TypeScript