Preact is (or was at one time) a nearly-complete implementation of React's APIs -- meaning a virtual DOM, etc. Synergy takes its own approach, and uses Custom

Preact is (or was at one time) a nearly-complete implementation of React's APIs -- meaning a virtual DOM, etc. Synergy takes its own approach, and uses Custom Elements (from the "Web Components" standard). Edit: and synergy is also optionally avlbl via CDN for the no-tooling approach you liked in your preact experiments.