message: fix(reakit-playground): Unmount React components correctly
diff: @@ -101,6 +101,11 @@ export function PlaygroundPreview({
  unmount
  ]);
  + React.useEffect(() => {
  + // Ensure that we unmount the React component when the effect is destroyed.
  + return () => unmount();
  + }, [unmount]);
  +
  htmlProps = unstable_useProps("PlaygroundPreview", options, htmlProps);
  return (
  