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 vote139 views1 answer
Linq get list of objects based on the value in grandchild
TypeScript
-1 vote123 views1 answer
What are the components of the environment? Explain it along with the examples.
TypeScript
0 vote123 views1 answer
TypeError: __cinit__() takes at least 2 positional arguments (0 given)
TypeScript
1 vote117 views1 answer
Replace \n with breakline in type scripte
TypeScript
3 votes134 views3 answers
How to view documents folder simulator swift
TypeScript
19 votes120 views4 answers
Sort array of objects by string property value
TypeScript
1 vote112 views6 answers
Swift constraints programmatically
TypeScript
0 vote125 views2 answers
Gradients colors in android
TypeScript
2 votes116 views1 answer
Cannot find module 'fs' or its corresponding type declarations.
TypeScript
4 votes138 views1 answer
Pub schedule firebase
TypeScript