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Learn how to seamlessly `update total quantity` in your shopping cart header using AJAX with Laravel 8. Simple steps provided!
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How to Update Total Quantity with AJAX in Laravel 8

If you're developing an online shopping cart with Laravel 8 and AJAX, one common feature needed is the updating of the total quantity of items in the cart whenever an item is added. This ensures that users have an accurate reflection of their cart's contents at all times without needing to refresh the page. In this guide, we'll walk through the problem and provide a clear solution to dynamically update the total quantity on the interface.

Understanding the Problem

When a user clicks the "Add to Cart" button, you want the total quantity displayed on the header to increment by one. However, you've run into an issue: the total quantity isn't updating as expected after AJAX calls. To ensure the cart reflects the right number of items, you need to modify both your backend and frontend code.

Step-by-Step Solution

1. Update the AddToCart Function

In your CartController, where you're adding products to the cart, you must ensure you return a response that indicates a successful addition. Modify the add() method to look like this:

[[See Video to Reveal this Text or Code Snippet]]

This response will be captured when the AJAX request is made, allowing the frontend to know that the action was successful.

2. Send AJAX Request on Button Click

You'll need to make sure that when the "Add to Cart" button is clicked, an AJAX request is sent correctly. Your existing setup is mostly correct but let's add a success handler to manage the response:

[[See Video to Reveal this Text or Code Snippet]]

3. Update the Total Quantity in Header

Make sure that the total quantity displayed in the header is correctly set up to show the quantity from the session as follows:

[[See Video to Reveal this Text or Code Snippet]]

This snippet ensures that the total quantity displayed reflects the session data whenever the page loads or refreshes.

Summary

By following these steps, you can ensure that your shopping cart updates the total quantity dynamically whenever an item is added via AJAX. Here’s a quick recap of what we covered:

Return a JSON response from your add() method to indicate success.

Use AJAX to send the request, and update the quantity on success.

Ensure the header displays the total quantity accessible from the session.

With these changes, your online shopping experience will be smoother, providing a better user experience as customers add items to their cart without any hiccups.

Now go ahead, implement these changes, and watch your total quantity update like a charm! Happy coding!