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Collaborative Text Editor
A real-time collaborative text editor using Yjs CRDTs and WebSockets (Hocuspocus) to enable conflict-free concurrent editing across multiple users. Built with a scalable document synchronization service, secure JWT authentication, and MongoDB persistence for seamless session recovery.
Challenges
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Synchronizing concurrent document edits across multiple users without conflicts or server lag
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Architecting a scalable document sync service with robust JWT authentication
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Ensuring MongoDB persistence handles quick session recovery during socket reconnects
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Demonstrating real-time capability with low-latency updates under heavy concurrency
Solutions
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Implemented Yjs CRDTs (Conflict-free Replicated Data Types) and WebSockets via Hocuspocus for sub-100ms real-time sync
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Designed a custom authentication provider inside Hocuspocus to validate JWTs on connection establishment
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Created a debounced document persistence pipeline to save editor states to MongoDB without overwhelming the database
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Built a highly optimized collaborative interface with visible user carets to verify low-latency synchronization
Features
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Conflict-Free Real-Time Collaborative Editing (Yjs CRDTs)
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WebSocket-based communication via Hocuspocus
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Secure JWT Authentication on Socket Handshake
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MongoDB Persistence for Document State Storage
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Instant Connection Recovery & Session Persistence
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Sleek collaborative workspace user interface
Technologies / Stack
Next.jsYjsHocuspocusMongoDBWebSocketsTailwindCSS
Status
Screenshots
