App.js

function App() {
  const [value, setValue] = React.useState('')
  
  function onChange(e, { ref }) {
    // ERROR --> e is actually the { ref } object so e.target is undefined
    setValue(e.target.value)
  }
  
  return (
    <div>
      <MyInput value={value} onChange={onChange} />
    </div>
  )
}