How To Create A RESTful API Using Express.js

Express.js is a popular Node.js framework that can be used to create RESTful APIs. In this article, we will guide you through the process of creating a RESTful API using Express.js.

Step 1: Install Express.js

To get started, you will need to install Express.js. You can do this by running the following command in your terminal:

npm install express

Step 2: Create Your Express App

Next, create a new file for your Express app. In this file, you will import Express and create an instance of it:

        const express = require('express');
        const app = express();
    

Step 3: Define Your API Endpoints

Now you can define your API endpoints. Here’s an example of how you can create a simple GET endpoint:

        app.get('/api/data', (req, res) => {
            res.send('This is some data from my API');
        });
    

Step 4: Start Your Server

Finally, you can start your Express server by listening on a specific port:

        const PORT = process.env.PORT || 3000;
        app.listen(PORT, () => {
            console.log('Server is running on port ' + PORT);
        });
    

Conclusion

Congratulations! You have successfully created a RESTful API using Express.js. You can now add more API endpoints and functionality to your Express app to build out your API further.