Function Component

packages/react-dom/src/__tests__/ReactDOMRoot-test.js:291–301

({text})

  it('should unmount and remount if the key changes', async () => {
    function Component({text}) {
      useEffect(() => {
        Scheduler.log('Mount');

        return () => {
          Scheduler.log('Unmount');
        };
      }, []);

      return <span>{text}</span>;
    }

    const root = ReactDOMClient.createRoot(container);