我有一些文件,为我的商店网站在下拉列表中建立一个购物车。
一个文件将所选项目添加到将成为我的购物车的数组中。另一个文件是CartDropdown
组件本身。我的购物车只在我关闭和打开它(重新挂载)时显示物品,但我希望每次添加新物品时它都重新挂载。
新增项目功能:
const ProductContainer = ({ productInfo }) => {
const { cartProducts, setCartProducts } = useContext(CartContext);
const cartArray = cartProducts;
const addProduct = () => {
productInfo.quantity = 1;
if (cartArray.includes(productInfo)) {
const index = cartArray.findIndex((object) => {
return object === productInfo;
});
cartProducts[index].quantity++;
setCartProducts(cartArray);
} else {
cartArray.push(productInfo);
setCartProducts(cartArray);
}
// setCartProducts(cartArray)
console.log(cartProducts);
// console.log(cartArray)
};
};
下拉式组件
const CartDropdown = () => {
const { setCartProducts, cartProducts } = useContext(CartContext);
const { setProducts, currentProducts } = useContext(ProductsContext);
// useEffect(() => {}, [cartProducts])
const cleanCart = () => {
const cleanProducts = currentProducts;
console.log(cleanProducts);
for (let i in cleanProducts) {
if (cleanProducts[i].hasOwnProperty("quantity")) {
cleanProducts[i].quantity = 0;
}
}
setProducts(cleanProducts);
setCartProducts([]);
};
return (
<div className="cart-dropdown-container">
<div className="cart-items">
{cartProducts.map((product) => (
<div key={product.id}>
<img src={product.imageUrl}></img>
</div>
))}
</div>
<button onClick={cleanCart}>CLEAN CART</button>
<Button children={"FINALIZE PURCHASE"} />
</div>
);
};
如何在每次cartProducts
更改时强制重新挂载下拉菜单?
购物车上下文:
export const CartContext = createContext({
isCartOpen: false,
setIsCartOpen: () => { },
cartProducts: [],
setCartProducts: () => { }
})
export const CartProvider = ({ children }) => {
const [isCartOpen, setIsCartOpen] = useState(false)
const [cartProducts, setCartProducts] = useState([])
const value = { isCartOpen, setIsCartOpen, cartProducts, setCartProducts };
return (
<CartContext.Provider value={value}>{children}</CartContext.Provider>
)
}
产品环境
export const ProductsContext = createContext({
currentProducts: null,
setProducts: () => {}
})
export const ProductsProvider = ({children}) => {
const [currentProducts, setProducts] = useState(shop_data)
const value = {currentProducts, setProducts}
return(
<ProductsContext.Provider value={value}>{children}</ProductsContext.Provider>
)
}
1条答案
按热度按时间kqlmhetl1#
您可以在每次要重新挂载时更换组件的关键道具。每次
cartProduct
更改时,更新key的值。您可以使用带有cartProduct作为依赖项的useEffect来实现这一点。至
更多说明请编辑: