'classes', 'new' and 'this' keyword

The 'new' keyword:

The new keyword crreate an instance of a user-defined object type or of one of the built-in object types that has a constructor function.

• Syntax:

new constructor(arguments);

The 'this' keyword:

The this keyword refers to an object. Which object depends on how this is being used or called. The this keyword refers to different objects depending on how it is used.

1. In an object method, this refers to the object.
2. In an alone, this refers to the global object.
3. In a function, this refers to the global object.
4. In a function, in strict mode, this is undefined.
5. In an event, this refers to the element that received the event.
6. Method like call(), apply(), and bind() -> this refers to any object.

Classes

Classes are template for creating objects. They encapsulate data with code to work on that data. Classes in JavaScript are built on prototypes but also have some syntax and semantics that are not shared with ES5 class-like semantics.

• Syntax:

class ClassName {
    constructor() { ... }
}