Home » Node.js3 August 2017

Node.js & Express Framework: Basic Introduction & Hello World Example [Beginner Tutorial]

This article shows how you can use Express Framework for creating Web based Application in Node.js.

Express is a free and open-source Node.js web application framework.

Create a Hello World application using Express Framework

Here’s a step-by-step guide:

1) Go to the folder where you want to create your new Node.js application/module.

2) In my case, my working Node.js directory is /var/www/html/test/nodejs

3) Create a new folder for your module. I will create a new folder named myapp. This is the name of my module.

4) Go inside your module directory.

5) Run npm init command which will create package.json file for your module. It will ask for certain questions like your module’s name, description, version, author, etc.

6) Install Express Framework with the following command:

Using -save option in the install command will update package.json file to add express module dependency for our module.

7) Create a new file named app.js.

The code above, loads the express module library. The express app starts the server and listens to port 3000. For the request of root URL (‘/’), the app responds with Hello World text.

8) Run node app.js in your terminal:

9) Now, open your browser and browse http://127.0.0.1:3000. You should be able to see Hello World text displayed in your browser.

That’s all. You have created your first application using Node.js and Express Framework.

Hope this helps. Thanks.

Node.js

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