In this blog post, we will explore how to utilize session storage in JavaScript to implement a simple shopping cart functionality. Session storage allows us to store data on the client side and access it across different web pages during a single session. It provides a convenient way to persist data without relying on server-side storage.

Getting Started

To begin, make sure you have a basic understanding of JavaScript and HTML. Also, ensure that your browser supports session storage as it is a built-in feature of modern web browsers.

Creating the Shopping Cart

First, let’s create a basic HTML structure for our shopping cart:

<div class="cart">
  <h2>Shopping Cart</h2>
  <ul class="items"></ul>
</div>

Next, we will write JavaScript code to handle the functionality of adding items to the cart:

// Get the cart element
const cart = document.querySelector('.cart');

// Function to add items to the cart
function addToCart(item) {
  // Get the items stored in session storage
  const cartItems = JSON.parse(sessionStorage.getItem('cartItems')) || [];

  // Add the new item to the cart
  cartItems.push(item);

  // Update the session storage
  sessionStorage.setItem('cartItems', JSON.stringify(cartItems));

  // Display the updated cart
  displayCartItems();
}

// Function to display the cart items
function displayCartItems() {
  // Get the items stored in session storage
  const cartItems = JSON.parse(sessionStorage.getItem('cartItems')) || [];

  // Create a list element for each item in the cart
  const itemsList = cart.querySelector('.items');
  itemsList.innerHTML = '';

  // Display each item in the cart
  cartItems.forEach((item, index) => {
    const li = document.createElement('li');
    li.textContent = item;
    li.dataset.index = index;
    itemsList.appendChild(li);
  });
}

// Call the displayCartItems function when the page loads
window.addEventListener('load', displayCartItems);

Adding Items to the Cart

To add items to the cart, simply call the addToCart function with the item as an argument. For example:

addToCart('Item 1');
addToCart('Item 2');

The addToCart function will store the items in session storage and update the cart display accordingly.

Conclusion

By using session storage, we can easily implement a shopping cart functionality in JavaScript. The session storage allows us to persist the cart data across different pages during a single session. This approach avoids the need for server-side storage and allows for a smoother user experience.

With this simple implementation, you can now add items to your shopping cart and display them using session storage. Remember to customize the design and additional features based on your specific requirements.

#javascript #shoppingcart