Video : Four ways of creating an object in JavaScript

There are four ways an object can be created in JavaScript

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Source Code :


	// Fours ways of creating an object in JavaScript


	// 1. object as a literal

	var car = {
	model: 'bmw',
	color: 'red',
	price: 2000,
	engine : {
	type :'petrol',
	power : 120
	}
	}

	car.owner = 'foo';


	Object.defineProperty(car, "yearmade", {
	writable: true,
	enumerable: true,
	configurable: false,
	value: 1984
	});

	console.log(JSON.stringify(car));

	// 2. using the new operator a.k.s Constructor Invocation Pattern



	function Car(model, color) {
	this.model = model;
	this.color = color;
	Object.defineProperty(this, "yearmade", {
	writable: true,
	enumerable: true,
	configurable: false,
	value: 1984
	});

	}

	console.log(Car.prototype);

	var c1 = new Car('BMW','Red');
	var c2 = new Car('Audi','Black');
	console.log(c1.yearmade);

	// 3 using the Object.create() method

	//it allows you to create an object from an existing object

	var Car1 = {
	model: 'BMW',
	color: 'red'
	}

	var ElectricCar = Object.create(Car1,{ym:{
	writable: true,
	enumerable: true,
	configurable: false,
	value: 1984
	}});
	//console.log(ElectricCar.ym); // BMW


	// 4 using the class starting ES6


	class Car3 {

	constructor(maker, price) {
	this.maker = maker;
	this.price = price;
	}

	getInfo() {
	console.log(this.maker + " costs : " + this.price);
	}
	}

	var carobj1 = new Car3('BMW',2000);
	carobj1.getInfo();

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Dhananjay Kumar