如何在 js map 中调用 react 函数？

Question

I have the below code, the problem is in the part where I am calling the RemoveProduct function in the map function:

function AddOrder() {
    const d = new Date();
    let text = d.toString();
    const [addOrder] = useMutation(queries.ADD_ORDER);
    const [editUser] = useMutation(queries.EDIT_USER_CART);
    const [editProduct] = useMutation(queries.EDIT_PRODUCT);

    function RemoveProduct (x)  {

        let getProd = useQuery(queries.GET_PRODUCTS_BY_ID, {
          fetchPolicy: "network-only",
          variables: {
            _id : x._id
          },
        });
        console.log(getProd.quantity)
        console.log(x.quantity)
        let a = getProd.quantity - x.quantity
        console.log(a)
        editProduct({
          variables: {
            _id : x._id,
            quantity: a
          },
        });
        return null;
    }

    const { currentUser } = useContext(AuthContext);

    if (error) {
        return <h1> error</h1>;
    } else if (loading) {
        return <h1> loading</h1>;
    } else if (data && getUserOrders.data && currentUser && data.getUser.cart.length > 0) {
        let newCart = [];
        let total = 0;
        for (let i = 0; i < data.getUser.cart.length; i++) {
            total += data.getUser.cart[i].price * data.getUser.cart[i].quantity;
            newCart.push({
                orderedQuantity: data.getUser.cart[i].quantity,
                _id: data.getUser.cart[i]._id,
                name: data.getUser.cart[i].name,
                image: data.getUser.cart[i].image,
                price: data.getUser.cart[i].price,
            });
        }
        
        newCart.map((x) => RemoveProduct(x))

    

        editUser({
            variables: {
                id: currentUser.uid,
                cart: [],
            },
        });
    }
    
}
export default AddOrder;

I get the following error when I run this code:

Uncaught Error: Rendered more hooks than during the previous render.

How can I fix this? I tried to create a separate component for RemoveProducts and call in this function but that did not work either.

Answer 1

1. Only call hooks at the top level
2. Don't call hooks inside loops, conditions or nested functions
3. Always use hooks at the top level of your React function, before any early returns
4. Only call hooks from React function components or from custom hooks.

I read this from the docs here

So try not to nest the function RemoveProduct or remove the hook called inside it