How to implement Inheritance in js2

We are assuming that you have installed js2 in your system, in case if you have not installed js2, first install js2.

First of all create a InheritanceTest.js2 file in scr directory with the content given below:
[js]
class Person { // Parent class
var firstName;
var lastName;

function initialize(firstName, lastName) { // Constructor
this.firstName = firstName;
this.lastName = lastName;
}

function toString() {
return this.firstName + ‘ ‘ + this.lastName;
}
}

class Employee extends Person { // Child class
var companyName;

function initialize(firstName, lastName, companyName) { // Constructor
this.$super(firstName, lastName);
this.companyName = companyName;
}

function toString() {
return this.$super() + ‘, ‘ + this.companyName;
}
}
[/js]

To compile js2 file into js file in lib directory run the command given below:
[bash]
js2-node compile -f=node ./src ./lib
[/bash]

Now create a js script named as inheritance.js in scr directory with following content:
[js]
var Person = require(‘../lib/InheritanceTest’).Person;
var Employee = require(‘../lib/InheritanceTest’).Employee;

var person = new Person(“Amit”, “Thakkar”);
console.log(person.toString())
var employee = new Employee(“Amit”, “Kumar”, “Intelligrape”);
console.log(employee.toString())
[/js]

Now run inheritance.js file with the command given below:
[bash]
node src/hello.js
// Output
Amit Thakkar
Amit Kumar, Intelligrape
[/bash]

Amit Kumar
amit.kumar@intelligrape.com
in.linkedin.com/in/amitkumar0110
twitter.com/amit_kumar0110
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