Create Modules in Node.js

While developing real-world applications using Node.js, we usually need to create our own modules to build a piece of functionality. A module in JavaScript is nothing but a collection of different JavaScript functions and objects that any external application or another module can access. Modules provide a way to reuse code between multiple programs. They also allow us to create more straightforward applications. A module can be beneficial as our program becomes more complex and benefits the team as a whole to collaborate more effectively. Modules help break down code into smaller, reusable pieces that can save time and reduce errors when building more complex applications.

Let’s now check out the steps to create our own modules in Node.js.

Create and consume modules

We’ll follow the steps mentioned below to create our modules and use them in other programs or applications.

Creating a module

In this step, we’ll create our first Node.js module, which will contain a list of greeting messages and one function to get a random greeting message from a set of messages. To implement this, we’ll use the exports keyword to help export the functionality to other programs or applications. This keyword allows us to make functions and variables available outside the module by attaching them to the exports object.
Let’s now have a look at the code.