I'm implementing a shopping cart for a ecommerce website. The shopping cart is a state variable shopCart represented by an array of objects. Each object contains information about a product, such as title and price. I am trying to implement a remove button, which is actually doing what is intended from it, which is to remove items from the shopCart state, but the changes are not represented on the screen render. I can empty the cart, but the screen still shows the products. Here is the main code of the shopping cart page:
return (
<div class={styles.container}>
<h1>Product</h1><h1>Quantity</h1><h1>Unit price</h1><h1>Total price</h1><div></div>
{
shopCart.map((product, i, array) => <CartItem key={product.id} product={product} index={i} array={array}/>)
}
</div>
)
And here is the implementation of CartItem.js
const CartItem = (props) => {
let { shopCart, setShopCart } = useContext(Context);
let product = props.product;
// takes the identification of a shopping cart product and removes it from the cart
const decrease = (element) => {
shopCart.forEach((el, i) => {
if (el.hasOwnProperty('id')) {
if (el.id === element) {
let aux = shopCart;
aux.splice(i, 1);
setShopCart(aux);
}
}
})
}
return (
<div>
<img src={product.image}></img>
<h1>{product.quantity}</h1>
<h1>{product.price}</h1>
<h1>{product.price * product.quantity}</h1>
<button onClick={() => {
decrease(product.id);
}}>Remove</button>
</div>
)
}
Why isn't it rendering the cart correctly, even though the cart items are being removed after each click of the remove button ?