Weather App Tutorial - Invoke Callback

LocationSearch.tsx

export const LocationSearch: FC<LocationSearchProps> = ({onSearch}) => {
  const [locationSearch, setLocationSearch] = useState('');
  const disableSearch = locationSearch.trim() === '';

  const addLocation = () => {
    onSearch(locationSearch); // Prop callback invoked - string passed
    setLocationSearch('');
  };

  return (
    ...
      <button className="btn btn-primary"
              onClick={addLocation} disabled={disableSearch}>Search</button>
    ...
  );
}