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ShareDB is a realtime database backend based onOperational Transformation(OT) of JSONdocuments. It is the realtime backend for theDerbyJS web applicationframework.

For help, questions, discussion and announcements, join theShareJS mailinglist orread the documentation.

Please report any bugs you find to theissuetracker.

• Realtime synchronization of any JSON document
• Concurrent multi-user collaboration
• Synchronous editing API with asynchronous eventual consistency
• Realtime query subscriptions
• Simple integration with any database
• Horizontally scalable with pub/sub integration
• Projections to select desired fields from documents and operations
• Middleware for implementing access control and custom extensions
• Ideal for use in browsers or on the server
• Offline change syncing upon reconnection
• In-memory implementations of database and pub/sub for unit testing
• Access to historic document versions
• Realtime user presence syncing

https://share.github.io/sharedb/

The documentation is stored as Markdown files, but sometimes it can be useful to run these locally. The docs are served usingJekyll, and require Ruby >2.4.0 andBundler:

gem install jekyll bundler

The docs can be built locally and served with live reload:

npm run docs:installnpm run docs:start