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@q9labsai/chalk-whiteboard

v5.4.1

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hhushhashhushhas

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@q9labsai/chalk-whiteboard

Reusable Chalk whiteboard behavior for SDKs and first-party applications.

  • @q9labsai/chalk-whiteboard exports framework-neutral whiteboard contracts.
  • @q9labsai/chalk-whiteboard/collab exports the Excalidraw collaboration and file synchronization engine.
  • @q9labsai/chalk-whiteboard/react exports WhiteboardCanvas, math authoring, and React-facing whiteboard types.
  • @q9labsai/chalk-whiteboard/embedded exports the versioned native bridge, ChalkWhiteboardController, and the compatibility manifest used by mobile hosts.

WhiteboardCanvas owns Excalidraw loading, collaboration lifecycle, cursor and scene updates, file synchronization, and math elements. Its classNames and icons props let each surface provide presentation without reimplementing that behavior. @q9labsai/chalk-react supplies Chalk's styled WhiteboardView as a thin wrapper around this component.

The embedded build is generated by pnpm run build:embedded. It produces a self-contained dist/embedded/chalk-whiteboard directory with Excalidraw 0.18.1, its fonts, MathJax, license notices, a content-security policy, and SHA-256 asset metadata. The renderer is offline-only. Authentication credentials, Sync tokens, storage signatures, and signed URLs remain in the native JavaScript host and are never posted into renderer JavaScript.

The native bridge uses exact build, protocol, renderer-generation, and scene-generation checks. Messages are strictly decoded and bounded to 32 MiB, duplicate message IDs are ignored, and a reload requests a canonical snapshot instead of trusting renderer state. Documents containing a required element type outside packages/whiteboard/src/embedded/compatibility-manifest.json open read-only with an “Update required” message.

The canonical whiteboard-v1 transport keeps the existing 128-element and 256-KiB per-frame limits, then carries larger logical updates as atomic multipart operations. A logical update can contain at most 10,000 elements, 128 parts, and 16 MiB of encoded frames. Incomplete inbound operations are never exposed to the renderer and recover by requesting a new snapshot after 10 seconds.