Function start

packages/react-aria/src/tokenfield/useTokenField.ts:784–788

()

  return useMemo(
    () => ({
      start() {
        // Android sometimes fires two compositionstart events in a row, without a compositionend.
        // In that case, reuse the existing tracker.
        mutationTracker.current ||= trackMutations(ref.current!);
      },
      stop() {
        mutationTracker.current?.();
        mutationTracker.current = null;