Nodemon for development reloading in Express

Introduction

Nodemon automatically restarts your Node.js server when you change your code. This saves time and effort during development.

When you want your Express server to reload automatically after code changes.

When you are actively developing and testing your backend API.

When you want to avoid manually stopping and starting your server.

When you want faster feedback while fixing bugs or adding features.

Syntax

Express

nodemon [your_node_app.js]

Run this command in your terminal instead of node your_node_app.js.

You can configure nodemon with a nodemon.json file for advanced options.

Examples

Starts nodemon to watch and reload index.js automatically.

Express

nodemon index.js

Watches the src folder for changes and reloads server.js.

Express

nodemon --watch src server.js

Reloads when files with .js or .json extensions change.

Express

nodemon --ext js,json app.js

Sample Program

This simple Express server responds with 'Hello, Nodemon!' on the home page. Run it with nodemon index.js to see automatic reloads when you edit the file.

Express

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

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

const PORT = 3000;
app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});

Important Notes

Install nodemon globally with npm install -g nodemon or as a dev dependency with npm install --save-dev nodemon.

Use nodemon only in development, not in production environments.

You can stop nodemon anytime by pressing Ctrl + C in the terminal.

Summary

Nodemon watches your Node.js files and restarts the server automatically.

It speeds up development by removing the need to restart manually.

Use simple commands like nodemon index.js to start.