Typescript, using classes without constructor

You can use class as a type which is the way you're using it. So, whether Hero is an interface or class it doesn't matter because you're using it as a type.

class Hero { id: number; name: string }

or

interface Hero { id: number; name: string }

The following doesn't concern whether Hero is a class or interface

let hero: Hero = { id: 1, name: 'me' }

Where interface and class differentiate is interface is only for you, it doesn't get transpiled into javascript. A class does and you cannot new an interface.

Constructor or no Constructor, if you new it then it is an instanceof. Try it again with this

let hero = new Hero();

Your instanceof log will be true because you did create an instance of Hero with the key word new.

I know this question has been answered before but as far as object oriented code goes it was always like this.

I believe you can do this without a constructor:

let hero: Hero = { ID: 1, Name: 'goku'};

but if you want to instantiate with the constructor you can do this in the class

class Hero{    //notice optional parameters. You have more flexibility this way.    constructor(id?: number, name?: string)    {        this.ID = id;      this.Name = name;    }    ID: number;    Name: string}

And do this with the implementation

let hero: Hero = new Hero(1,'goku');let hero2: Hero = { ID: 2, Name: 'superman' }