$ show cocopon/tweakpane
Tweakpane is a compact, highly customizable UI library for creating live-adjustable parameter panels, primarily used in creative coding, game development, and data visualization. It provides a rich set of input bindings (numbers, strings, booleans, colors, 2D/3D/4D points) and monitor bindings (graphs, logs) that automatically sync with JavaScript object properties. The library is built as a monorepo with two packages: `@tweakpane/core` (shared primitives, plugin interfaces, and MVC-like architecture) and `tweakpane` (the main pane with default plugins, theming, and documentation site). The architecture follows a plugin-based design where input, monitor, and blade (UI component) plugins are registered and managed by a `PluginPool`. Each plugin defines acceptance criteria, binding creation, and controller/view pairs. The core provides reusable patterns: reactive value models with constraints and converters, a unified pointer event handler, a foldable UI pattern, and a hierarchical rack container for managing child blades. Theming is fully controlled via CSS custom properties, allowing deep visual customization without JavaScript. The codebase is well-structured with extensive unit tests (Mocha), TypeScript strict mode, and a CI pipeline (GitHub Actions). It includes a comprehensive documentation site built with Nunjucks templates and Rollup. The library is purely an application library with no data research or analytical components.
The LLM identified 5 files worth highlighting for reuse:
Defines the core plugin interfaces (`BladePlugin`, `InputBindingPlugin`, `MonitorBindingPlugin`) with versioned acceptance and binding/controller creation. This pattern enables extensibility and is reusable for any UI library needing a plugin architecture.
A generic reactive value model with equality checking, constraint application, and change event emission. It is the foundation for all bindings and can be extracted as a standalone observable value utility.
Unified mouse and touch event handler for drag interactions. It normalizes pointer events, provides start/move/end callbacks, and handles edge cases like preventing text selection. Reusable for any web UI needing drag behavior.
Parses and formats CSS color strings (hex, RGB, HSL, object) with fallback and format detection. Demonstrates robust string-to-color and color-to-string conversion that can be reused in any color-related project.
Manages a tree of child controllers with position tracking (first, last, veryfirst, verylast) and propagates value changes and layout events. This pattern is reusable for any UI container that needs ordered children with add/remove/move operations.