React Measure

react-measure is a React component that efficiently computes the dimensions and position of its child components. It leverages the browser's native `ResizeObserver` API to detect element dimension changes, offering a performant alternative to traditional polling or window resize event listeners. The library includes a polyfill for `ResizeObserver` to ensure broad browser compatibility across different environments. Currently stable at version 2.5.2, `react-measure` functions as a render prop component, allowing developers to precisely specify which rectangle properties (such as `client`, `offset`, `scroll`, `bounds`, or `margin`) are needed. Its key differentiator is the `ResizeObserver` integration, providing accurate and efficient measurement updates with minimal overhead, suitable for responsive designs and component queries. The package has been in a maintenance phase since its last major updates, providing a stable and reliable utility.