Here is a basic example to get you started with Express.js:
- Installation: You can install Express.js using npm (Node Package Manager) by running the following command in your terminal:
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npm install express npm install -g nodemon<code> |
Note: Nodemon restarts the server as we make a change in any of our files, else we need to restart the server manually after each modification.
- Create a new project: Create a new directory for your project and navigate to it in the terminal. Then, run the following command to initialize a new npm project:
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npm init -y |
- Create an Express.js application: In your project directory, create a new file named
app.jsand add the following code to it:
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const express = require('express'); const app = express(); app.get('/', (req, res) => { res.send('Hello World!'); }); app.listen(3000, () => { console.log('Example app listening on port 3000!'); }); |
- Start the server: You can start the server by running the following command in the terminal:
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nodemon app.js |
- Test the application: Open your web browser and navigate to
http://localhost:3000. You should see the message “Hello World!” displayed on the page.
This is just a simple example to get you started with Express.js. You can build much more complex applications using the many features and functionalities provided by the framework. To learn more, you can visit the official Express.js website and read the documentation.
Output:
