P2P Poll App

A peer-to-peer polling app where users can add options and vote on them. All data syncs directly between browsers using WebRTC — no central server stores any poll data.

How It Works

• Yjs CRDTs handle shared state — concurrent edits from different peers merge automatically without conflicts
• y-webrtc establishes direct WebRTC connections between browsers (a public signaling server is used only for peer discovery)
• Each user gets a stable random ID (stored in localStorage) ensuring one vote per user per option
• Polls are identified by room name, shareable via URL

Getting Started

npm install
npm run dev

Open http://localhost:5173 in your browser. To share a specific poll, use the ?room= query parameter:

http://localhost:5173/?room=my-poll

Share this URL with others to join the same poll.

Cross-Device Testing

npm run dev -- --host

Then open http://<your-local-ip>:5173/?room=test on another device on the same network.

Tech Stack

• Yjs — CRDT library for conflict-free shared state
• y-webrtc — WebRTC provider for P2P connectivity
• Vite — Dev server and bundler
• Vanilla JS — No framework dependencies