Function click

packages/react-dom/src/__tests__/ReactDOMLegacyFiber-test.js:1152–1161

()

    const handlerB = () => ops.push('B');

    function click() {
      const event = new MouseEvent('click', {
        bubbles: true,
        cancelable: true,
      });
      Object.defineProperty(event, 'timeStamp', {
        value: 0,
      });
      node.dispatchEvent(event);
    }

    class Example extends React.Component {
      state = {flip: false, count: 0};