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typescript class inheritance tutorial

TypeScript Class:

As we discussed in earlier tutorials that TypeScript supports object-oriented programming concepts like classes, interfaces, etc. Class is act as a blue print or template for creating objects. It provides state and behaviour for its objects. A class is used to encapsulate the data for the object.

TypeScript Inheritance:

Inheritance is a way to implement IS-A relationship i.e. parent child relationship. Subclass inherits the super class properties like data member, methods. Inheritance is the way of re-usability of code. Let us take the example of parent and child. A child inherits the properties of its parent.

Why inheritance is used?

  • Code re-usability.
  • Run-time polymorphism.


class subclass extends superclass{
   //subclass code


class Employee { 
   constructor(name:string) { 
      this.name = name;
class Engineer extends Employee { 
   display():void { 
      console.log("Name:  "+this.name);
var obj = new Engineer("Jai"); 

Try it:

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TypeScript Tutorial

TypeScript Overview.
Typescript vs Javascript.
Typescript let vs var.
TypeScript Hello World.
Typescript Data Types.
Typescript Variable Declaration.
TypeScript operators list.
TypeScript Arithmetic Operators.
TypeScript Comparison Operators.
TypeScript Bitwise Operators.
Typescript Logical Operators.
TypeScript Assignment Operators.
Typescript Conditional Operator.
Typescript String Operator.
Typescript typeof Operator.
TypeScript control statements.
TypeScript Switch Statement.
TypeScript for loop.
TypeScript for in loop.
TypeScript while loop.
TypeScript do while loop.
Typescript for loop break.
TypeScript for loop continue.
Typescript function.
Typescript returning function.
Typescript parameterized function.
Typescript function optional parameter.
Typescript rest parameters.
Typescript default parameters.
Typescript anonymous function.
Typescript function constructor.
Typescript Arrow/Lambda function.
Typescript function overloading.
TypeScript number object.
TypeScript string object.
TypeScript boolean object.
TypeScript date object.
TypeScript math object.
TypeScript array object.
TypeScript tuples.
TypeScript union type.
TypeScript interface.
TypeScript interface inheritance.
TypeScript interface multiple inheritance.
TypeScript class.
Typescript class inheritance.
Typescript class interface.
TypeScript abstract class.
TypeScript object.
TypeScript duck typing.
TypeScript NameSpace.
TypeScript Multi-file namespaces.
TypeScript module.
TypeScript ambient module.
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