5 Simple Rules to Master ‘this’ in JavaScript

5 Simple Rules to Master ‘this’ in JavaScript

5 Simple Rules to Master ‘this’ in JavaScript - Those five simple rules are as follows the only article you need to read to make sense of the “this” keyword in JavaScript's. We will learn how to determine the value of the “this” keyword using five simple rules. The only article you need to read to make sense of the “this” keyword in JavaScript's.

The only article you need to read to make sense of the “this ” keyword in JavaScript.

In this article, we cover the all-important yet so confusing topic in JavaScript which is the “this” keyword.

TL;DR

If “_this_” scares you, do not worry! We will learn how to determine the value of the “_this_” keyword using five simple rules.

Those five simple rules are as follows:

  • The Regular One — Default binding
  • _Function Inside an Object _— Implicit binding
  • Function Borrowing —** Explicit binding**
  • Using Function to Create Objects — New binding
  • _How Arrow Function Differs from the Regular Ones— _Lexical binding

Don’t worry about these scary names. Computer Science people have a fancy for naming terms so that they sound extra-terrestrial. Under the hood, they are just common concepts that any willing human can understand.

The “this” variable corresponds to how you invoke a function. These rules help us to determine the value of this in various scenarios.

Once you understand these rules, then you would not fear them anymore.

Before we begin, please go through this article to understand how this works.

What is “this” in brief

In JavaScript, whenever a function is called, a new execution context is created by the JavaScript engine. That execution context exists until the function has finished executing. Every execution context contains a variable called ‘this’.

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