Purpose

• Study a working example of CRDT
• Create a reproducible environment for yjs.
• Deconstruct yjs
  • Understand how it stores the data
  • Reproduce my own function CRDT
• Evaluate if yjs can be used in production

Current Evaluation

yjs can't be used in production because:

• Doesn't work with create-react-app
  • This is important for me because it makes it easier for me to manage the front end
• No TypeScript definitions

Concerns

• Is Yjs still being actively developed on? Yes
  • https://github.com/y-js/yjs/commits/master
  • They are working on v13
  • gitter community has chatter
    • https://gitter.im/y-js/yjs

Difficulties

• Yjs uses a dynamic require. Read packages/frontend/README.md to disable it
• No official LevelDB docker image
  • google/leveldb#513
  • https://hub.docker.com/r/ekristen/leveldb/
    • 4 years old
  • https://computingforgeeks.com/how-to-install-leveldb-on-ubuntu-18-04-ubuntu-16-04/
    • https://github.com/google/leveldb/releases

Links

• http://y-js.org/
  • https://github.com/y-js/yjs
    • Latest is 13.0.0-94
  • https://github.com/y-js/yjs/tree/v12.3.3
  • https://github.com/y-js/y-websockets-client
  • https://github.com/y-js/y-websockets-server
    • Last commit Apr 7 2018
    • "yjs": "^13.0.0-51"
  • https://github.com/y-js/y-memory
    • Last commit Jul 1 2017
    • "yjs": ">= 9.0.0 < 14.0.0"
• https://github.com/google/leveldb