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+---
+title: useIsomporphicEffect
+tags: hooks,effect,beginner
+firstSeen: 2021-09-29T05:00:00-04:00
+---
+
+Eesolves to `useEffect()` on the server and `useLayoutEffect()` on the client.
+
+- Use `typeof` to check if the `window` object is defined and return the `useLayoutEffect()` if it is, or `useEffect()` otherwise.
+
+```jsx
+const useIsomorphicEffect =
+  typeof window !== 'undefined' ? React.useLayoutEffect : React.useEffect;
+```
+
+```jsx
+const MyApp = () => {
+  useIsomorphicEffect(() => {
+    window.console.log('Hello');
+  }, []);
+
+  return null;
+};
+
+ReactDOM.render(<MyApp />, document.getElementById('root'));
+```