Given
```js
function ThrowInEffect() {
  React.useEffect(() => {
    throw new Error('passive effect')
  }, [])
  return null;
}
```

In React 17 this error got logged to the console (and triggered the error overlay in create-react-app) regardless of whether `ThrowInEffect` was a child of an Error Boundary or not.

In React 18 (`createRoot` and legacy root API) an Error Boundary will prevent logging that error to the console (and not trigger the error overlay in create-react-app).

Errors during render work like they did in React 17.

Behavior in React 17: https://codesandbox.io/s/react-17-error-boundaries-vp21e?file=/src/index.js
Behavior in React 18: https://codesandbox.io/s/react-18-error-boundaries-psd56?file=/src/index.js


Recording of effect errors in React 17 and 18 and with and without Error Boundaries_

https://user-images.githubusercontent.com/12292047/122749780-053ced00-d28e-11eb-98ce-075dcdc53ee2.mp4


React.useLayoutEffect(() => {
          throw Error('Boom');
        }, []);
        return null;
      }
      const root = ReactDOM.createRoot(container);
      expect(() => {
        act(() => {
          root.render(<Foo />);
        });
      }).toThrow('Boom');
      if (__DEV__) {
        expect(windowOnError.mock.calls).toEqual([
          [
            
            expect.objectContaining({
              message: 'Boom',
            }),
          ],
        ]);
        expect(console.error.calls.all().map(c => c.args)).toEqual([