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Home Interviews How do you define a route in Express? – MindStick
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1 Answers

ICSM Computer
ICSM Computer 03 Apr 2025
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In Express (a Node.js web framework), you define a route using methods like app.get(), app.post(), app.put(), etc., depending on the HTTP verb you want to handle.

Here’s the basic syntax:

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

// Define a route
app.get('/example', (req, res) => {
  res.send('This is the /example route!');
});

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

Breakdown:

app.get() defines a GET route.

The first argument ('/example') is the route path.

The second argument is a callback function (called a route handler) with req (request) and res (response) parameters.

res.send() sends a response to the client.

Other common HTTP methods:

app.post('/submit', (req, res) => { ... });
app.put('/update/:id', (req, res) => { ... });
app.delete('/delete/:id', (req, res) => { ... });
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