Formats

Pattern

Canvas Draw Artifact

Excalidraw whiteboard artifact with data-whiteboardDelta streaming, uncontrolled canvas, SVG/PNG/.excalidraw export, scene templates (architecture, user flow, org chart), and in-memory versions — no database persistence.

IntermediateApr 2026View the full pattern on desktop
Canvas Draw Artifact preview

Problems solved

  • Stream Excalidraw scene JSON with data-whiteboardDelta UI parts
  • Draw on an uncontrolled Excalidraw canvas inside the artifact
  • Export SVG, PNG, or .excalidraw files
  • Start from architecture, user-flow, or org-chart scene templates

Use cases

  • Architecture whiteboarding agents
  • User-flow mapping sessions
  • Org chart drafting in chat
  • Excalidraw artifact prototypes

AI SDK APIs

streamTextcreateUIMessageStreamgatewaytool

Tags

aiexcalidrawwhiteboarddiagramarchitecturestreamingai-sdkartifacts

Requirements

Node.js
24+
Memory
256MB
Other
  • Vercel AI Gateway API key

Environment variables

External services

openaiupstash

Ready to use?

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