Function App

packages/react-reconciler/src/__tests__/ReactTransition-test.js:174–184

()

  it('isPending works even if called from outside an input event', async () => {
    let start;
    function App() {
      const [show, setShow] = useState(false);
      const [isPending, _start] = useTransition();
      start = () => _start(() => setShow(true));
      return (
        <Suspense fallback={<Text text="Loading..." />}>
          {isPending ? <Text text="Pending..." /> : null}
          {show ? <AsyncText text="Async" /> : <Text text="(empty)" />}
        </Suspense>
      );
    }

    const root = ReactNoop.createRoot();