react‑router‑loader is a Webpack loader that lets you defer loading of React‑Router route components until the route is actually rendered. By requiring a component with the `react-router!` (or `react-router?name=…!`) prefix, the loader creates separate code‑splitting chunks, optionally with custom names, keeping the main bundle lean. It’s aimed at React developers using React‑Router who want on‑demand (lazy) loading of route handlers in their Webpack builds.