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Yjs is a high-performance, open-source CRDT (Conflict-free Replicated Data Type) implementation for building collaborative, real-time applications. It enables multiple users to edit shared data structures—such as text documents, arrays, maps, and XML trees—synchronously and offline. Yjs is network-agnostic and works with WebRTC, WebSocket, or any other transport layer, making it ideal for collaborative editors, whiteboards, and design tools. Its compact updates and powerful reconciliation system make it one of the most efficient and developer-friendly CRDT libraries available.
Features
- Real-time collaborative editing using CRDTs
- Supports rich data types like text, arrays, and maps
- Network-agnostic with adapters for WebSocket, WebRTC, and more
- Offline support with automatic conflict resolution
- Efficient binary update encoding and syncing
- Works in browsers, Node.js, and embedded environments
- Integrates with editors like ProseMirror, Quill, and CodeMirror
- Built-in awareness protocol for user cursors and presence
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CollaborationLicense
MIT LicenseFollow Yjs
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