TypeScript Essentials

Classes

In the next version of JavaScript, ECMAScript 6, a standard has been proposed for the definition of classes. TypeScript brings this concept to the current versions of JavaScript. Classes consist of a variety of different properties and members. These members can be either public or private and static or instance members.

Definitions

Creating classes in TypeScript is essentially the same as creating interfaces. Let's create a very simple Point class that keeps track of an x and a y position for us:

class Point {
    public x: number;
    public y: number;
    constructor(x: number, y = 0) {
        this.x = x;
        this.y = y;
    }
}

As you can see, defining a class is very simple. Use the keyword class and then provide a name for the new type. Then you create a constructor ...