How to Properly Use Functions Inside module.exports in Node.js

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The Problem: Function Not Defined

To better understand the issue, let's take a look at the original code snippet provided:

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In this code, there are two key problems:

Incorrect use of this - In the context of an arrow function, this does not behave the same way as it does in regular functions. This can cause confusion, especially for new developers.

The Solution: Naming Your Functions

The best way to resolve this issue is to define functions directly without relying on this. Instead, simply name your function and use it as needed. Here’s how you can refactor the code to make it work correctly:

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Key Changes Made

Function Definition: Instead of using this, we defined myFunction(int) directly within the module. This makes it callable within that particular scope without ambiguity.

Function Call: The line let test = myFunction(5); successfully calls the function we defined, and it will not throw any errors.

Why Use Named Functions?

Using named functions instead of anonymous functions or relying on this has several benefits:

Readability: Named functions make your code easier to read and understand.

Scope Clarity: They avoid any confusion related to the context of this.

Easier Debugging: Named functions can make debugging simpler as they provide a clear reference in stack traces.

Conclusion