SketchSync
Visit Live SiteA high-performance, real-time collaborative vector drawing whiteboard application.
Next.jsReactTypeScriptHTML5 CanvasSocket.IOTailwind CSS
Overview
SketchSync is a collaborative virtual whiteboard that enables multiple users to draw, edit, and coordinate on vector shapes and freehand diagrams with near-zero latency. Built around a raw HTML5 canvas rendering engine, it handles real-time cursor tracking, shape serialization, and conflict-free collaborative workspace states.
Core Architecture
- Frontend ClientNext.js, React, TypeScript, HTML5 Canvas API
- Collaboration & SyncSocket.IO for instant shape actions and multi-user cursor tracking
- State & HistoryIsolated client-side undo/redo operations with collaborator change reconciliation
- PersistenceDebounced localStorage room caching and auto-restore workspace logic
- DeploymentVercel
Key Features
- Custom HTML5 Canvas rendering loop optimized via requestAnimationFrame.
- Multiplayer live collaboration with real-time cursor presence and custom label tags.
- Vector drawing support for rects, circles, arrows, diamonds, and freehand lines.
- Collaborator-aware undo/redo history to revert actions without wiping peer edits.
- Auto-saving room workspaces with auto-debounced changes for persistent room states.
Challenges Solved
- Low-Latency Rendering: Constructing a robust draw-cycle loop using requestAnimationFrame to prevent lagging during high-density brush strokes.
- Conflict-Free Syncing: Reconciling cursor updates and live drawing actions in real-time across multiple clients using lightweight Socket.IO payloads.
- Canvas Scaling & Resolution: Rendering sharp vector boundaries on Retina and high-DPI displays by dynamically adjusting coordinate pixel-ratios.
Outcome & Impact
Created a top-tier interactive collaboration tool featuring smooth 60fps canvas performance and highly responsive WebSocket message handling.