Introduction to Express

Installation of Express

For Express to be installed in our system, we must follow the procedures below:

Step 1: Project directory creation

 We will aim to create a directory for our project and make that our working directory.

Step 2: JSON packet creation

To build a package.json file for the project we're working on, we use the npm init command.

The command above lists all of our project's dependencies. When you add further dependencies during the development process, such as when setting up your build system, the file will be updated.

When asked in the terminal, keep pressing enter and type "yes/no" at the terminus line.

Step 3: Installing Express

Now in your coding ninjas(name of your folder) folder, type the following command line:

Terminal View

Step 4: Verification

Verify that Express.js was installed on your Windows:

To check that express.js was installed on your system or not, you can run the following command line on cmd:

Terminal View

The version of express.js will be displayed on the command prompt on successful installation.

Also see, Difference Between Controller and Restcontroller

Frequently Asked Questions

1. What is NodeJS?

Answer: Node.js is an open-source, cross-platform runtime environment that is used for javascript execution.

2. What is Express?

Answer: Express is a small framework. It sits on top of Node.js as web server functionality to simplify its APIs and add more helpful new features. 

Key takeaways

In this blog, we introduced express.js as a back-end web application framework for Node.js and discussed its installation process to our system keeping the point in our mind that we have node.js already installed in our system. We also discussed how to verify that Express is successfully verified in our system or not.

You can use Coding Ninjas Studio to practise questions on web development and use the Coding Ninja Self-paced Web development to grasp numerous web development concepts.