# peers/peerjs

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13,359 stars · 1,461 forks · TypeScript · MIT

## Links

- GitHub: https://github.com/peers/peerjs
- Homepage: https://peerjs.com
- awesome-repositories: https://awesome-repositories.com/repository/peers-peerjs.md

## Topics

`browser` `dataconnection` `javascript` `p2p` `parcel` `typescript` `webrtc`

## Description

PeerJS is a real-time communication library and framework designed to establish direct peer-to-peer data and media connections between browsers. It provides a simplified wrapper for managing the lifecycles of WebRTC connectivity, enabling the exchange of audio, video, and data without a central relay.

The project includes a coordination server that handles signaling management by mapping unique user identities to network connection details. This server facilitates the discovery of remote peers and the exchange of metadata required to perform the initial connection handshake.

The framework supports several communication patterns, including real-time video calling, decentralized data messaging, and direct binary file transfers. It utilizes an event-driven system to manage connection states and employs heartbeat monitoring to track the health of active peer sessions.

## Tags

### Networking & Communication

- [Peer Connectivity](https://awesome-repositories.com/f/networking-communication/webrtc-media-orchestration/peer-connectivity.md) — Establishes direct browser-to-browser data and media channels using the WebRTC protocol for low-latency communication.
- [Real-time Communication Libraries](https://awesome-repositories.com/f/networking-communication/distributed-systems-p2p/distributed-computing/communication-protocols/real-time-communication-libraries.md) — Provides a library for streaming audio, video, and data messages directly between clients without a central relay.
- [Peer Discovery](https://awesome-repositories.com/f/networking-communication/peer-to-peer-networking/peer-discovery.md) — Maps unique user identities to network details via a registry to facilitate peer discovery.
- [Signaling Servers](https://awesome-repositories.com/f/networking-communication/peer-to-peer-networking/signaling-servers.md) — Includes a coordination server to exchange connection metadata and identity descriptors for peer handshakes.
- [Real-time Communication](https://awesome-repositories.com/f/networking-communication/real-time-communication.md) — Facilitates low-latency data exchange and media streaming through direct browser-to-browser connections.
- [Browser-Based Video Calling](https://awesome-repositories.com/f/networking-communication/browser-based-video-calling.md) — Enables the implementation of real-time audio and video calls between browsers using coordinated media streams.
- [Decentralized Messaging](https://awesome-repositories.com/f/networking-communication/decentralized-messaging.md) — Supports the creation of chat and collaborative tools where messages travel directly between peers.
- [Peer-to-Peer File Sharing](https://awesome-repositories.com/f/networking-communication/distributed-systems-p2p/peer-to-peer-networking/peer-to-peer-file-sharing.md) — Allows sending and receiving binary files directly between users via decentralized WebRTC channels.
- [Connection Lifecycle Managers](https://awesome-repositories.com/f/networking-communication/network-reliability-diagnostics/connection-session-management/connection-management/connection-lifecycle-managers.md) — Provides an event-driven system to manage peer states and network transitions throughout the connection lifecycle.

### Software Engineering & Architecture

- [WebRTC Wrappers](https://awesome-repositories.com/f/software-engineering-architecture/api-wrappers/webrtc-wrappers.md) — Provides a simplified API wrapper for managing WebRTC connection lifecycles and peer discovery.

### Web Development

- [P2P Frameworks](https://awesome-repositories.com/f/web-development/webrtc-configurations/real-time-media-servers/webrtc-facilitators/p2p-frameworks.md) — Offers a comprehensive framework for establishing direct peer-to-peer data and media connections between browsers.

### DevOps & Infrastructure

- [Heartbeat Monitors](https://awesome-repositories.com/f/devops-infrastructure/automation-orchestration/task-execution-frameworks/heartbeat-monitors.md) — Employs periodic heartbeat pings to monitor active connection health and prune dead peer sessions.