React Komposer is a tiny library that lets you wrap any React component in a “container” that handles data fetching, subscriptions, loading states, and error handling in a declarative way. By providing a data‑loader function (which can work with Promises, Redux, RxJS, MobX, Meteor, etc.) you compose a higher‑order component that supplies the fetched data as props, with options for performance tuning, SSR, dependency injection and easy testing—aimed at React developers who need reusable, clean data‑layer wiring for their UI components.