In the first statement itself, we are using the “require” keyword to include the express module.

The below “Guru99” code example shows how to use the require function Let’s look at an example of how we can use the “require” keyword. This keyword is a way that Node.js uses to incorporate the functionality of a module in an application.

Once the module has been installed, in order to use a module in a Node.js application, you need to use the ‘require’ keyword.

The above command will download the necessary files which contain the “express modules” and take care of the installation as well.

The below command line shows how a module “express” can be installed. In order to use modules in a Node.js application, they first need to be installed using the Node package manager.

Bluebird – Bluebird is a fully-featured promise library with a focus on innovative features and performance.

Restify – restify is a lightweight framework, similar to express for building REST APIs.

MongoDB – The MongoDB Node.js driver is the officially supported node.js driver for MongoDB.

Jade – Jade is a high-performance template engine and implemented with JavaScript for node and browsers.

This module is good for creation of chatting based applications.

Socket.io – Socket.IO enables real-time bidirectional event-based communication.

Express framework – Express is a minimal and flexible Node js web application framework that provides a robust set of features for the web and mobile applications.

There are many readymade modules available in the market which can be used within Node js.īelow are some of the popular modules which are used in a Node js application

NPM (Node Package Manager) Publish PackageĪs stated earlier, modules in Node js are a way of encapsulating code in a separate logical unit.

Since each module is an independent entity with its own encapsulated functionality, it can be managed as a separate unit of work. That’s where modules in Node.js comes in action.

It’s always a good programming practice to always segregate code in such a way that makes it more manageable and maintainable for future purposes. A module in Node.js is a logical encapsulation of code in a single unit.

Creating node project