NodeJs — Middleware in Express

Middleware functions are used in Express to process requests before sending responses. They can be used for tasks like authentication, logging, or parsing request bodies.

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

// Custom middleware
app.use((req, res, next) => {
  console.log(`${req.method} ${req.url}`);
  next();
});

app.get('/', (req, res) => {
  res.send('Middleware example');
});

app.listen(3000);