Canvas Color-Based Object Tracking Utility

canvas-color-tracker is a utility library (current stable version 1.3.2) designed to facilitate interaction with dynamically rendered objects on an HTML5 canvas, where native object-specific mouse events are not available. It provides a system for tracking canvas elements by assigning each a unique, invisible color key on a 'shadow' or off-screen canvas. Developers render their objects on this shadow canvas with these unique colors, then use `mousemove` events on the main canvas to sample the pixel color under the mouse pointer. This color is then used to look up the associated object in the `canvas-color-tracker` registry. A key feature is its checksum encoding mechanism for color keys, which enhances lookup reliability by accounting for pixel anti-aliasing and color mutations at object boundaries. The library focuses solely on the registry aspect: generating keys, registering objects, and performing lookups. It enables effective object identification and interaction for complex canvas applications, supporting up to approximately 262,000 objects with default settings.