# Build a Realtime Chat App in 7 Lines of JavaScript Using GenosDB
A real-time P2P chat application in 7 lines of JavaScript — no backend, no framework, no WebSocket server. Just [GenosDB](https://genosdb.com/building-genosdb-p2p-database) and a browser.
This example demonstrates the raw simplicity and power of GenosDB: a fully functional, peer-to-peer chat application built with nothing more than vanilla HTML and a few lines of JavaScript.
```html
```
## How It Works
- **GenosDB** handles all P2P communication via WebRTC.
- `db.put()` writes a message to the distributed graph.
- `db.map()` reactively streams all messages from any peer.
- No server. No WebSocket setup. No Firebase. Just peers.
## Why This Matters
This isn't a toy demo — it's a proof of concept showing that **real-time, multi-user applications** can be built with GenosDB in minutes, not days.
> *7 lines. Zero backend. Infinite possibilities.*
---
> **This article is part of the official documentation of GenosDB (GDB).**
> GenosDB is a distributed, modular, peer-to-peer graph database built with a Zero-Trust Security Model, created by **Esteban Fuster Pozzi ([estebanrfp](https://github.com/estebanrfp))**.
📄 [Whitepaper](https://github.com/estebanrfp/gdb/blob/main/WHITEPAPER.md) | overview of GenosDB design and architecture
🛠 [Roadmap](https://github.com/estebanrfp/gdb/blob/main/ROADMAP.md) | planned features and future updates
💡 [Examples](https://github.com/estebanrfp/gdb/blob/main/docs/genosdb-examples.md) | code snippets and usage demos
📖 [Documentation](https://github.com/estebanrfp/gdb/blob/main/docs/index.md) | full reference guide
🔍 [API Reference](https://github.com/estebanrfp/gdb/blob/main/docs/genosdb-api-reference.md) | detailed API methods
📚 [Wiki](https://github.com/estebanrfp/gdb/wiki) | additional notes and guides
💬 [GitHub Discussions](https://github.com/estebanrfp/gdb/discussions) | community questions and feedback
🗂 [Repository](https://github.com/estebanrfp/gdb) | Minified production-ready files
📦 [Install via npm](https://www.npmjs.com/package/genosdb) | quick setup instructions
🌐 [Website](https://estebanrfp.com/) | [GitHub](https://github.com/estebanrfp) | [LinkedIn](https://www.linkedin.com/in/estebanrfp/)