FigJam Plugin Development
Architecture
| Thread |
File |
APIs |
Role |
| Main |
code.ts |
figma.* only |
Canvas rendering |
| UI |
ui.ts |
Browser APIs |
WebSocket client, connection UI |
Critical: code.ts has NO browser APIs (window, document, fetch, WebSocket).
Communication
CLI ←─ WebSocket ─→ ui.ts ←─ postMessage ─→ code.ts ←─ figma.* ─→ Canvas
Build & Import
cd packages/plugin && bun run build
Import: Figma Desktop → Plugins → Development → Import from manifest → packages/plugin/manifest.json
Debugging
- UI errors: Right-click plugin UI → Inspect
- Main errors: Plugins → Development → Open console
JSON Import
- Accepts DSL (nodes array) or IR (nodes object)
- Validates with
@figram/core, normalizes to IR
- Errors shown in alert with path + message
Key Files
| File |
Purpose |
manifest.json |
Plugin config |
src/code.ts |
Canvas rendering |
src/ui.ts |
WebSocket + UI |
src/icons/ |
Service icons |
