ES5

var Person = function (name, yearOfBirth, job) {
	this.name = name;
	this.yearOfBirth = yearOfBirth;
	this.job = job;
}
Person.prototype.calculateAge = function () {
	var age = new Date().getFullYear - this.yearOfBirth;
	console.log(age);
}
var james = new Person('James', 1986, 'Student');

ES6 (ES2015)

class Person {
	constructor(name, yearOfBirth, job) {
		this.name = name;
		this.yearOfBirth = yearOfBirth;
		this.job = job;
}
	calculateAge() {
		var age = new Date().getFullYear - this.yearOfBirth;
		console.log(age);
	}
	static greeting(){
		console.log('Hey there!');
	}
}
const james = new Person('James', 1986, 'Student');

Static Methods are methods that are attached to the class but are not inherited by objects that are created by the class

static greeting(){
	console.log('Hey there!');
}

• Class Definitions are not hoisted, you need to first implement a class and then you can use it.
• Classes have methods not properties