const [error, setError] = useState<string | null>(null) const [error, setError] = useState<string[]>([]) // array of strings
const [user, setUser] = useState<{name: string, age: number} | undefined>()
{ user && user.name} { user && user.age}
const user: React.FC = () => { return
User
}
const handleChange = (event: React.ChangeEvent) => { console.log(event) }