TypeScript 2.x By Example

Inheritance

In object-oriented programming, inheritance allows us to extend the functionality of a class from a parent class. In TypeScript, we use a keyword, extends, in a child class and refer the parent class. By extending the functionality in the child class, we can have access to all the public members of the parent class:

class Editor {   constructor(public name: string,public isTypeScriptCompatible : Boolean) {}  details() {    console.log('Editor: ' + this.name + ', TypeScript installed: ' + this.isTypeScriptCompatible);  }}class VisualStudio extends Editor{    public OSType: string    constructor(name: string,isTypeScriptCompatible : Boolean, OSType: string) {        super(name,isTypeScriptCompatible);        this.OSType = OSType;    }}let VS = new VisualStudio('VSCode', ...