curriculum/challenges/english/blocks/learn-basic-oop-by-building-a-shopping-cart/63ee611d478dca0b77f6a393.md
The this keyword in JavaScript is used to refer to the current object. Depending on where this is used, what it references changes. In the case of a class, it refers to the instance of the object being constructed. You can use the this keyword to set the properties of the object being instantiated. Here is an example:
class Computer {
constructor() {
this.ram = 16;
}
}
In your constructor, use the this keyword to set the items property to an empty array. Also, set the total property to 0, and the taxRate property to 8.25.
You should use the this keyword to set the items property of your class to an empty array.
assert.match(code, /this\.items/);
const cart = new ShoppingCart();
assert.isArray(cart.items);
assert.isEmpty(cart.items);
You should use the this keyword to set the total property of your class to 0.
assert.match(code, /this\.total/);
const cart = new ShoppingCart();
assert.equal(cart.total, 0);
You should use the this keyword to set the taxRate property of your class to 8.25.
assert.match(code, /this\.taxRate/);
const cart = new ShoppingCart();
assert.equal(cart.taxRate, 8.25);
<!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>
`;
}
);
--fcc-editable-region--
class ShoppingCart {
constructor() {
}
};
--fcc-editable-region--