Function update

frontend/src/app/Inventory/Item.tsx:38–41

(key: string, value: any)

    }, [catId, wUnit]);

    function update(key: string, value: any) {
        const i = Object.assign({}, { ...copy, [key]: value });
        setCopy(i);
    }

    function handleSave() {
        if (!copy.name || isEqual(copy, item)) return;