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JavaScript Object-Oriented JavaScript Object Basics Dot Notation & Bracket Notation

What is " this " in javascript?

const teacher = {

firstName : "Ashley",

lastName : "Boucher",

printName: function(){

  console.log(this.firstName + this.lastName);

} }

I do not get what " this " does. I cant check console because work space have port which is weird. For the case, is the " this " getting " Ashley " ?

1 Answer

Alexander Besse
.a{fill-rule:evenodd;}techdegree seal-36
Alexander Besse
Full Stack JavaScript Techdegree Graduate 35,115 Points

Hi Peter Huang,

From W3Schools:

In JavaScript, the this keyword refers to an object.

Which object depends on how this is being invoked (used or called).

The this keyword refers to different objects depending on how it is used:

In an object method, this refers to the object.
Alone, this refers to the global object.
In a function, this refers to the global object.
In a function, in strict mode, this is undefined.
In an event, this refers to the element that received the event.
Methods like call(), apply(), and bind() can refer this to any object.