The **react‑resize‑detector** fork restores React 16/17 compatibility and provides a tiny (~2 KB) TypeScript hook that uses the native ResizeObserver API to report element width, height and resize events without window‑resize listeners or timeouts. It’s aimed at React developers who need JavaScript‑driven, programmatic handling of element size changes—e.g., for responsive layouts, chart redrawing, or performance‑critical calculations.