I built this to make it easier to create collaborative design tools like infinite canvases. It also works for games.

It's an ECS framework that runs in the browser with built-in multithreading via Web Workers, reactive change-tracking queries, and a companion package called “canvas-store” that handles multiplayer sync, local-first persistence, undo/redo, and schema migrations out of the box.

GitHub: https://github.com/WillH0lt/woven-ecs