Mern Stack – How to create a route in Express JS

If you’re working with the Mern Stack (MongoDB, Express, React, Node.js), you’ll need to know how to create routes in Express JS. Express is a powerful and flexible web application framework for Node.js, and is commonly used in Mern Stack development.

Step 1: Install Express

First, you’ll need to install Express in your Node.js project. You can do this using npm:

npm install express

Step 2: Create a new Express app

Once you have Express installed, you can create a new Express app by requiring the express module and calling the express() function:


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


Step 3: Define a route

To define a route in Express, you use the app.get(), app.post(), app.put(), app.delete(), or other HTTP methods provided by Express. Here’s an example of defining a simple GET route:


app.get('/', (req, res) => {
res.send('Hello, Mern Stack!');
});


This route will respond with ‘Hello, Mern Stack!’ when a GET request is made to the root URL of your app.

Step 4: Start the server

Finally, you’ll need to start the Express server so it can listen for incoming requests. You can do this by calling the app.listen() method and specifying the port number to listen on:


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


Now your Express app is up and running, and you can access your route by navigating to http://localhost:3000 in your web browser.