Function App

packages/react/src/__tests__/ReactStrictMode-test.js:212–227

()

    const log = [];

    function App() {
      React.useState(() => {
        log.push('Compute initial state count: 1');
        return 1;
      });
      React.useReducer(
        s => s,
        2,
        s => {
          log.push('Compute initial reducer count: 2');
          return s;
        },
      );

      return 3;
    }

    const container = document.createElement('div');
    const root = ReactDOMClient.createRoot(container);