const Component = () => {
  const [arr, setArr] = useState([]);

  useEffect(() => {
    fetchMyThings().then((res) => {
      setArr(res);
    });
  }, [setArr]);

  const deleteItem = (deleteId = '') => {
    fetchMyThings(deleteId).then((res) => {
      setArr(arr.filter(({ id }) => id !== deleteId));
    });
  };

  return (
    <div>
      {arr.map(({ id }) => (
        <div key={id} onClick={() => deleteItem(id)} />
      ))}
    </div>
  );
};