TypeScript-Inheritance

TYPESCRIPT

TypeScript - Inheritance 

Create a class "Human" which has two protected members:

• name [type as string] and age [type as number]
• constructor(): this initializes name and age
• Create another class "Employee" which extends "Human" and have three members:
• department (string), batch (string) and role (string)
• constructor(): this initializes parent class protected members, department, batch and role.
• getInfo(): this displays name, age, department, batch and role of the employee in a specific format.

Sample Output:

Name: person one Age: 21 Department: computer science Batch: 2019 Role: Trainee

Solution:

class Human {

  protected name: string;

  protected age: number;

  constructor(theName: string, theAge: number) {

    this.name = theName;

    this.age = theAge;

  }

}

class Employee1 extends Human {

  department: string;

  batch: string;

  role: string;

  constructor(

    name: string,

    age: number,

    theDepartment: string,

    theBatch: string,

    theRole: string

  ) {

    super(name, age);

    this.department = theDepartment;

    this.batch = theBatch;

    this.role = theRole;

  }

  getInfo() {

    console.log(

      "Name: " +

        this.name +

        "\nAge: " +

        this.age +

        "\nDepartment: " +

        this.department +

        "\nBatch: " +

        this.batch +

        "\nRole: " +

        this.role

    );

  }

}

let newEmployeeObject = new Employee1('person one',21,'computer science','2019','Trainee')

newEmployeeObject.getInfo()

Also check out -    TypeScript Class                        TypeScript Polymorphism