Node.js Crash Course #6 | Middlewares | Dartbucket

Welcome to the sixth installment of our Node.js Crash Course series! In this episode, we will be diving into the world of middlewares and how they can enhance the functionality of your Node.js applications.

What are Middlewares?

Middleware functions are functions that have access to the request object (req), the response object (res), and the next middleware function in the application’s request-response cycle. Middleware functions can perform tasks like modifying the request and response objects, ending the request-response cycle, or calling the next middleware function in the stack.

Using Middlewares in Node.js

To use middlewares in your Node.js application, you can simply define a function that takes three parameters – req, res, and next – and then call this function before your route handlers. Here’s an example:

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

// Middleware function
app.use((req, res, next) => {
  console.log('Middleware executed!');
  next();
});

// Route handler
app.get('/', (req, res) => {
  res.send('Hello World!');
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});
    
  

Conclusion

Middlewares are a powerful feature in Node.js that can help you modularize your code, handle common tasks, and enhance the functionality of your applications. By using middlewares effectively, you can streamline your development process and create more robust and scalable applications.

We hope you found this crash course on middlewares helpful. Stay tuned for more tutorials and tips on Node.js development from Dartbucket!