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Y CRDT

A collection of Rust libraries oriented around implementing Yjs algorithm and protocol with cross-language and cross-platform support in mind. It aims to maintain behavior and binary protocol compatibility with Yjs, therefore projects using Yjs/Yrs should be able to interoperate with each other.

Project organization:

  • lib0 is a serialization library used for efficient (and fairly fast) data exchange.
  • yrs (read: wires) is a core Rust library, a foundation stone for other projects.
  • yffi (read: wifi) is a wrapper around yrs used to provide a native C foreign function interface. See also: C header file.
  • ywasm is a wrapper around yrs that targets WebAssembly and JavaScript API.

Other projects using yrs:

  • ypy - Python bindings.
  • yrb - Ruby bindings.

Feature parity among projects

yjs
(13.6)		 yrs
(0.18)		 ywasm
(0.18)		 yffi
(0.18)		 y-rb
(0.5)		 y-py
(0.6)		 ydotnet
(0.4)		 yswift
(0.2)
YText: insert/delete ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
YText: formatting attributes and deltas ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
YText: embeded elements ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
YMap: update/delete ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
YMap: weak links ✅ 
(weak-links branch)		 ✅ ✅ ✅ ❌ ❌ ❌ ❌
YArray: insert/delete ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
YArray & YText quotations ✅ 
(weak links branch)		 ✅ ✅ ✅ ❌ ❌ ❌ ❌
YArray: move ✅ 
(move branch)		 ✅ ✅ ✅ ❌ ✅ ✅ ❌
XML Element, Fragment and Text ✅ ✅ ✅ ✅ ✅ ✅ ✅ ❌
Sub-documents ✅ ✅ ✅ ✅ ❌ ❌ ✅ ❌
Shared collections: observers ✅ ✅ ✅ 
(incompatible with yjs)		 ✅ ✅ ✅ ✅ ✅
Shared collections: recursive nesting ✅ ✅ ✅ ✅ ❌ ❌ ❌ ❌
Document observers ✅ ✅ ✅ 
(incompatible with yjs)		 ✅ ✅ ✅ ✅
Transaction: origins ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅
Snapshots ✅ ✅ ✅ ✅ ❌ ❌ ❌ ❌
Sticky indexes ✅ ✅ ✅ ✅ ❌ ❌ ✅ ❌
Undo Manager ✅ ✅ ✅ ✅ ❌ ❌ ✅ ✅
Awareness ✅ ✅ ❌ ❌ ✅ ❌ ✅ ❌
Network provider: WebSockets ✅ 
(y-websocket)		 ✅ 
(yrs-warp)		 ❌ ❌ ✅ 
(y-rb_actioncable)		 ✅ 
(ypy-websocket)		 ✅ ❌
Network provider: WebRTC ✅ 
(y-webrtc)		 ✅ 
(yrs-webrtc)		 ❌ ❌ ❌ ❌ ❌ ❌

Maintainers

Sponsors

NLNET

Ably

y-crdt's Projects

y-octo icon y-octo

CRDT implementation which is compatible with https://github.com/yjs/yjs

y-sync icon y-sync

Yjs/Yrs sync protocol implementation

ykt icon ykt

Kotlin bindings for yrs.

ypy icon ypy

Python bindings to y-crdt

yrb icon yrb

Ruby bindings for yrs.

yrs-warp icon yrs-warp

Yrs web socket data exchange protocol implementation for tokio warp server

yswift icon yswift

Swift language bindings to Y-CRDT

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