mobyjs

MobY: MobX bindings for Yjs

Experimental bridge between MobX and Yjs. Demo + Playground on CodeSandbox.

What does this solve?

Although Yjs is great for data syncing, observing changes to your data model can be quite cumbersome. You'd need to manually call observe to keep updated of (incoming) changes and keep the rest of your application in sync.

MobY brings the reactive data model of MobX to Yjs. Combine best of both worlds:

• Yjs: great for data syncing
• MobX: great for developing applications that automatically react to state changes

Cool, how does it work?

Set up your yJS document (same as plain-yJS):

const ydoc = new Y.Doc();
const provider = new WebrtcProvider("doc", ydoc);

Call observeYJS to patch the document. From now on, ydoc will be compatible with MobX observers:

observeYJS(ydoc);

Use the Yjs document somewhere in an observer, for example using MobX autorun:

autorun(() => {
    console.log(ydoc.getMap("data").get("magicnumber")); // automatically log the Yjs value once it's updated
})

Or use mobx-react-lite to automatically rerender your React components.

Demo?

Playground on CodeSandbox. Open multiple windows and click the button to see the magic.