Loro

Description

Loro is a CRDT (Conflict-free Replicated Data Types) library that makes it easy to build collaborative, local-first applications. It offers automatic merging, offline availability, and fast synchronization across peers. Loro works seamlessly in Rust, JavaScript (via WASM), and Swift, empowering developers to create real-time, version-controlled applications with minimal effort.

Features

Core CRDT Features

• Peer-to-peer synchronization – Share data directly between clients without central servers.
• Automatic conflict resolution – Merges edits seamlessly with no manual intervention.
• Offline-first availability – Works fully without internet and syncs when online.
• Scalable performance – Efficiently supports large documents and many users.
• Delta updates – Transmits only incremental changes for faster sync.

Supported CRDT Algorithms

• 📝 Text Editing with Fugue – Advanced algorithm for concurrent text editing.
• 📙 Rich Text CRDT – Supports collaborative editing with formatting and styles.
• 🌲 Moveable Tree – Flexible data structure for hierarchies like files or outlines.
• 🚗 Moveable List – Ordered list that supports concurrent inserts and moves.
• 🗺️ Last-Write-Wins Map – Simple key-value store with conflict resolution.

Advanced Features

• 🚀 Fast document loading – Optimized startup for large or complex datasets.
• ⏱️ Time travel through history – Replay or inspect past states instantly.
• 🏛️ Version control with collaboration – Combines Git-like history with real-time editing.
• 📦 Shallow snapshots – Lightweight snapshots similar to Git shallow clones.

Technology Stack

• Rust (core library and bindings)
• JavaScript/TypeScript with WASM
• Swift (mobile integration)
• Loro Inspector (web-based debugging tool)