troubleshooting

Hyedration issues with Next.js

Uncaught Error: Hydration failed because the initial UI does not match what was rendered on the server

Sam
Uncaught Error: Hydration failed because the initial UI does not match what was rendered on the server Solution From Next.js 13, return jsx once the component is mounted function Component() { const [mounted, setMounted] = useState(false); useEffect(() => { setMounted(true); }, []); if (!mounted) return <></>; // write rest of your code } Error: ```bash Unhandled Runtime Error Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined.