react

Resolves to useEffect() on the server and useLayoutEffect() on the client.

  • Use typeof to check if the Window object is defined. If it is, return the useLayoutEffect(). Otherwise return useEffect().
const useIsomorphicEffect =
  typeof window !== 'undefined' ? React.useLayoutEffect : React.useEffect;
const MyApp = () => {
  useIsomorphicEffect(() => {
    window.console.log('Hello');
  }, []);
 
  return null;
};
 
ReactDOM.createRoot(document.getElementById('root')).render(
  <MyApp />
);
Python Syntaxreact-snippets