Observable

JavaScript-based notebook platform for interactive data visualization, with reactive programming and built-in collaboration.

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Key Features

✓ Automatic updates: Cells re-run when dependencies change
✓ Topological order: Execution based on dependencies, not position
✓ Live updates: Real-time reactivity
✓ No hidden state: Transparent data flow
✓ D3.js native: Best-in-class charting library
✓ Plot: Modern grammar of graphics for JS
✓ Inputs: Interactive controls built-in
✓ Embeds: Charts embeddable anywhere
✓ Real-time editing: Google Docs-style
✓ Forking: Build on others' work
✓ Teams: Shared workspaces
✓ Publishing: One-click sharing
✓ File attachments: CSV, JSON, images
✓ Database connectors: SQL databases
✓ APIs: Fetch from any endpoint
✓ Observable Framework: Full-stack data apps