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 (0.21)	ywasm (0.18)	yffi (0.21)	y-rb (0.5)	y-py (0.6)	ydotnet (0.4)	yswift (0.2)	y_ex (0.6)
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)	❌	❌	❌	❌	❌	❌	❌

Y CRDT

Feature parity among projects

Maintainers

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