TypeScript

Cheatsheet

Types

Assigning Variables

//Number
let x = 42;
let exampleNumber:number = 66;

//String 
let exampleName: string = "Person1";

//Boolean
let exampleBoolean: boolean = false;

//Date
let exampleDate: Date = new Date(2021, 7, 17);

//Any
let exampleAny: any = "Can be anything";

//Array
let exampleArray: string[] = ['item1', 'item2'];

Assigning a Null Value

//Null
let exampleNull: number = null;

Assigning a Tuple

//Tuple
let exampleTuple: [string, number];

Assigning Constant

const exampleConstNum: number = 99;
const exampleConstString: string = "Value";

Void Function

function exampleVoid(msg: string): void {
console.exampleVoid(msg);
}

Classes