marcelmokos/typescript-basic-types-table.csv

## typescript-basic-types-table.csv

          
            Javascript type
             constructor
             example values
             typescript type
             example usage
             alternative syntax

            
              Boolean
              Boolean(1);
              true, false
               boolean
              const isOpen: boolean = true;

            
              Number
              Number('1');
              1, 2
               number
              const n: number = 1;

            
              String
              String('');, '',", ``
               'ok'
               string
              const str: string = 'ok';

            
              Array
              new Array(); [];
              [1, 2, 3];
              number[]; Array<number>;
              const list: number[] = [1, 2, 3];
              const list: Array<number> = [1, 2, 3];

            
              Null
               null
               null
               null
              const n: null = null;

            
              Undefined
               undefined
               undefined
               undefined
              const u: undefined = undefined;

            
              Object
              new Object();
              {key: 'value'};
               object
              const item: object = {key: 'value'};
              const item: {[key: string]: string} = {key: 'value'};

            
              
              
              ['Hello', true];
               Touple
              const hi: [string, boolean] = ['Hello', true]

            
              
              
              
               enum
              enum Color {Red, Green, Blue}

            
              
              
              
               any
              let x: any = 4; x = ''; x = false;

            
              
              
              
               void
              function log(): void => {};
              const fn = (): void => {};

            
              
              
              
               never
              const error = (): never => { throw new Error(); };
              const fn = (): never => { while (true) {}; };
Javascript type	constructor	example values	typescript type	example usage	alternative syntax
Boolean	Boolean(1);	true, false	boolean	const isOpen: boolean = true;
Number	Number('1');	1, 2	number	const n: number = 1;
String	String('');, '',", ``	'ok'	string	const str: string = 'ok';
Array	new Array(); [];	[1, 2, 3];	number[]; Array<number>;	const list: number[] = [1, 2, 3];	const list: Array<number> = [1, 2, 3];
Null	null	null	null	const n: null = null;
Undefined	undefined	undefined	undefined	const u: undefined = undefined;
Object	new Object();	{key: 'value'};	object	const item: object = {key: 'value'};	const item: {[key: string]: string} = {key: 'value'};
		['Hello', true];	Touple	const hi: [string, boolean] = ['Hello', true]
			enum	enum Color {Red, Green, Blue}
			any	let x: any = 4; x = ''; x = false;
			void	function log(): void => {};	const fn = (): void => {};
			never	const error = (): never => { throw new Error(); };	const fn = (): never => { while (true) {}; };