How to create a class in JavaScript

In JavaScript classes can be created using functions. Let’s see how.

function Car() {
    this.make = 'Honda';
    this.model = 'Civic';
    this.color = 'gray';

    this.getInfo = function() {
        return this.make + ' ' + this.model + ' ' + this.color;
    };
}

var mycar = new Car();

The method getInfo() gets recreated every time we create a new object. Instead we can add getInfo() to the prototype.

Car.prototype.getInfo = function() {
    return this.make + ' ' + this.model + ' ' + this.color;
}