JavaScript is a versatile language that you can use on the front-end and back-end of a website. In this article, we will be discussing JavaScript object-oriented programming (OOP), specifically in ES5 and ES6.
ES5 is the version of JavaScript that was released in 2009. ES6 is the most recent version of JavaScript, and was released in 2015. ES6 has many new features, including classes and modules.
In ES5, you can create classes using the function keyword. The function keyword is used to create functions, so it can also be used to create classes. Here is an example of a class in ES5:
function Person(name, age) { this.name = name; this.age = age; }
In ES6, you can create classes using the class keyword. The class keyword is used to create classes, so it can also be used to create modules. Here is an example of a class in ES6:
class Person { constructor(name, age) { this.name = name; this.age = age; } }
In both ES5 and ES6, you can create methods for your classes. Methods are functions that are associated with a class. Here is an example of a method in ES5:
Person.prototype.sayName = function() { console.log(this.name); };
In ES6, you can create methods for your classes using the keyword method. Here is an example of a method in ES6:
class Person { constructor(name, age) { this.name = name; this.age = age; } sayName() { console.log(this.name); } }
In both ES5 and ES6, you can access the properties of a class using the keyword this. Here is an example of how you would access the properties of a class in ES5:
console.log(Person.prototype.name);
console.log(Person.prototype.age);
In ES6, you can access the properties of a class using the keyword this. Here is an example of how you would access the properties of a class in ES6:
console.log(this.name);
console.log(this.age);
In both ES5 and ES6, you can create instances of a class using
