curriculum/challenges/english/blocks/workshop-shopping-cart/63f02a4ef92d711ec1ff618c.md
You also need to update the total price of the cart when the user adds an item. Create a calculateTotal method in the ShoppingCart class.
In that method, declare a subTotal variable and use the reduce method on the items array to calculate the sum of the price property of each item in the array. Use total and item as the parameters for your callback.
Remember to set your initial value in the reduce method.
You should create a calculateTotal method in the ShoppingCart class.
assert.isFunction(cart.calculateTotal);
Your calculateTotal method should have a subTotal variable declared with const.
const afterCalculateTotal = code.split('calculateTotal')[1];
assert.match(afterCalculateTotal, /const\s+subTotal\s*=/);
Your calculateTotal method should use the reduce method on the items array.
const afterCalculateTotal = code.split('calculateTotal')[1];
assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce/);
Your reduce callback should use total and item as the first and second parameter. Remember to use arrow function syntax.
const afterCalculateTotal = code.split('calculateTotal')[1];
assert.match(afterCalculateTotal, /\(\s*total\s*,\s*item\s*\)\s*=>/);
Your reduce callback should return the sum of total and item.price. Use an implicit return.
const afterCalculateTotal = code.split('calculateTotal')[1];
assert.match(afterCalculateTotal, /\(\s*total\s*,\s*item\s*\)\s*=>\s*(?:total\s*\+\s*item\.price|item\.price\s*\+\s*total)/);
Your reduce call should have an initial value of 0.
const afterCalculateTotal = code.split('calculateTotal')[1];
assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total\s*,\s*item\s*\)\s*=>\s*(?:total\s*\+\s*item\.price|item\.price\s*\+\s*total)\s*,\s*0\s*\)/);
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>freeCodeCamp Shopping Cart</title>
<link rel="stylesheet" href="./styles.css" />
</head>
<body>
<header>
<h1 class="title">Desserts Page</h1>
</header>
<main>
<button id="cart-btn" type="button" class="btn">
<span id="show-hide-cart">Show</span> Cart
</button>
<div id="cart-container">
<button class="btn" id="clear-cart-btn">Clear Cart</button>
<div id="products-container"></div>
<p>Total number of items: <span id="total-items">0</span></p>
<p>Subtotal: <span id="subtotal">$0</span></p>
<p>Taxes: <span id="taxes">$0</span></p>
<p>Total: <span id="total">$0</span></p>
</div>
<div id="dessert-card-container"></div>
</main>
<script src="./script.js"></script>
</body>
</html>
*,
*::before,
*::after {
margin: 0;
padding: 0;
box-sizing: border-box;
}
:root {
--dark-grey: #1b1b32;
--light-grey: #f5f6f7;
--black: #000;
--white: #fff;
--grey: #3b3b4f;
--golden-yellow: #fecc4c;
--yellow: #ffcc4c;
--gold: #feac32;
--orange: #ffac33;
--dark-orange: #f89808;
}
body {
background-color: var(--dark-grey);
}
.title {
color: var(--light-grey);
text-align: center;
margin: 25px 0;
}
#dessert-card-container {
display: flex;
flex-direction: column;
flex-wrap: wrap;
align-items: center;
}
.dessert-card {
background-color: var(--light-grey);
padding: 15px;
text-align: center;
border-radius: 15px;
margin: 20px 10px;
}
.dessert-price {
font-size: 1.2rem;
}
.btn {
display: block;
cursor: pointer;
width: 100px;
color: var(--dark-grey);
background-color: var(--gold);
background-image: linear-gradient(var(--golden-yellow), var(--orange));
border-color: var(--gold);
border-width: 3px;
}
.btn:hover {
background-image: linear-gradient(var(--yellow), var(--dark-orange));
}
#cart-btn {
position: absolute;
top: 0;
right: 0;
}
.add-to-cart-btn {
margin: 30px auto 10px;
}
#cart-container {
display: none;
position: absolute;
top: 60px;
right: 0;
background-color: var(--light-grey);
width: 200px;
height: 400px;
border: 8px double var(--black);
border-radius: 15px;
text-align: center;
font-size: 1.2rem;
overflow-y: scroll;
}
.product {
margin: 25px 0;
}
.product-count {
display: inline-block;
margin-right: 10px;
}
.product-category {
margin: 10px 0;
}
@media (min-width: 768px) {
#dessert-card-container {
flex-direction: row;
}
.dessert-card {
flex: 1 0 21%;
}
#cart-container {
width: 300px;
}
}
const cartContainer = document.getElementById("cart-container");
const productsContainer = document.getElementById("products-container");
const dessertCards = document.getElementById("dessert-card-container");
const cartBtn = document.getElementById("cart-btn");
const clearCartBtn = document.getElementById("clear-cart-btn");
const totalNumberOfItems = document.getElementById("total-items");
const cartSubTotal = document.getElementById("subtotal");
const cartTaxes = document.getElementById("taxes");
const cartTotal = document.getElementById("total");
const showHideCartSpan = document.getElementById("show-hide-cart");
let isCartShowing = false;
const products = [
{
id: 1,
name: "Vanilla Cupcakes (6 Pack)",
price: 12.99,
category: "Cupcake",
},
{
id: 2,
name: "French Macaron",
price: 3.99,
category: "Macaron",
},
{
id: 3,
name: "Pumpkin Cupcake",
price: 3.99,
category: "Cupcake",
},
{
id: 4,
name: "Chocolate Cupcake",
price: 5.99,
category: "Cupcake",
},
{
id: 5,
name: "Chocolate Pretzels (4 Pack)",
price: 10.99,
category: "Pretzel",
},
{
id: 6,
name: "Strawberry Ice Cream",
price: 2.99,
category: "Ice Cream",
},
{
id: 7,
name: "Chocolate Macarons (4 Pack)",
price: 9.99,
category: "Macaron",
},
{
id: 8,
name: "Strawberry Pretzel",
price: 4.99,
category: "Pretzel",
},
{
id: 9,
name: "Butter Pecan Ice Cream",
price: 2.99,
category: "Ice Cream",
},
{
id: 10,
name: "Rocky Road Ice Cream",
price: 2.99,
category: "Ice Cream",
},
{
id: 11,
name: "Vanilla Macarons (5 Pack)",
price: 11.99,
category: "Macaron",
},
{
id: 12,
name: "Lemon Cupcakes (4 Pack)",
price: 12.99,
category: "Cupcake",
},
];
products.forEach(
({ name, id, price, category }) => {
dessertCards.innerHTML += `
<div class="dessert-card">
<h2>${name}</h2>
<p class="dessert-price">$${price}</p>
<p class="product-category">Category: ${category}</p>
<button
id="${id}"
class="btn add-to-cart-btn">Add to cart
</button>
</div>
`;
}
);
class ShoppingCart {
constructor() {
this.items = [];
this.total = 0;
this.taxRate = 8.25;
}
addItem(id, products) {
const product = products.find((item) => item.id === id);
const { name, price } = product;
this.items.push(product);
const totalCountPerProduct = {};
this.items.forEach((dessert) => {
totalCountPerProduct[dessert.id] = (totalCountPerProduct[dessert.id] || 0) + 1;
})
const currentProductCount = totalCountPerProduct[product.id];
const currentProductCountSpan = document.getElementById(`product-count-for-id${id}`);
currentProductCount > 1
? currentProductCountSpan.textContent = `${currentProductCount}x`
: productsContainer.innerHTML += `
<div id="dessert${id}" class="product">
<p>
<span class="product-count" id="product-count-for-id${id}"></span>${name}
</p>
<p>${price}</p>
</div>
`;
}
getCounts() {
return this.items.length;
}
--fcc-editable-region--
--fcc-editable-region--
};
const cart = new ShoppingCart();
const addToCartBtns = document.getElementsByClassName("add-to-cart-btn");
[...addToCartBtns].forEach(
(btn) => {
btn.addEventListener("click", (event) => {
cart.addItem(Number(event.target.id), products);
totalNumberOfItems.textContent = cart.getCounts();
})
}
);
cartBtn.addEventListener("click", () => {
isCartShowing = !isCartShowing;
showHideCartSpan.textContent = isCartShowing ? "Hide" : "Show";
cartContainer.style.display = isCartShowing ? "block" : "none";
});