Realtime Device Tracker using Node.js, Socket.IO & Leaflet In this tutorial, you’ll learn how to build a realtime location tracking application that uses the browser’s GPS, Socket.IO for live communication, and Leaflet.js to display users on a map. 🚀 Project Overview Backend: Node.js, Express.js, Socket.IO Frontend: HTML, Leaflet.js, Socket.IO client Features: Live GPS tracking, multi-user map, disconnect cleanup 📁 Folder Structure project-root/ ├── app.js ├── package.json ├── src/ │ ├── public/ │ │ ├── css/ │ │ │ └── style.css │ │ └── js/ │ │ └── script.js │ ├── routes/ │ │ └── routers.js │ ├── socket/ │ │ └── socketHandler.js │ └── views/ │ └── index.ejs 🧠 How It Works Each user shares their location using the browser's navigator.geolocation API. Location is sent to the server via Socket.IO . The server broadcasts each user’s position to all clien...