Remove item from shopping cart react js

I working on adding/removing items to a shopping cart in my react js project after I add items to the cart I add "-" and "+" buttons that on click should decrease/increase item quantity. I've managed to make the add-to-cart, increase work but I can't figure out how to delete the item from the cart when the quantity becomes 0. This is my code so far:

const [items, setItems] = useState([]);

const handleDecrease = (id) => {
    setItems((prevState) =>
      prevState.map(
        (item) =>
          item.id === id
            ? item.qty !== 1
              ? { ...item, qty: item.qty - 1 }
              : item.id !== id
            : item // !id
      )
    );
  };

{items?.map((item) => {
            return (
              <div
                key={item.id}
              >
                <div onClick={() => handleDecrease(item.id)}>-</div>
                <div>{item.title}</div>
                <div> ${item.price * item.qty}</div>
                <div>{item.qty}</div>
              
              </div>
            );
          })}

In my handleDecrease function, I check if the item quantity is !==1, then I decrease the quantity by 1; if the quantity is 1 and "-" is clicked again, I want to remove the item entirely from the items array, but my code only adds false to the items array. How can I remove the item?

There are multiple ways to solve this problem, but the simplest is using the helping array:

const handleDecrease = (id) => {
  const newItems = [];

  items.map((item) => {
    if (item.id === id) {
      item.qty !== 1 && newItems.push({ ...item, qty: item.qty - 1 });
    } else {
      newItems.push(item);
    }
  });

  setItems(newItems);
};