Technical Requirements Document

Introduction

1. The objective of this technical requirements document is to outline the necessary steps and specifications to fix the cache issues experienced in the app. The programming languages that can be utilized for this purpose are JavaScript, CSS, HTML, and Python.
2. Problem Description
3. There is a caching issue affecting the user experience when adding or removing items from the shopping cart. The problem is observed in both Firefox and Chrome browsers, with slightly different symptoms:

a. Firefox:

- Items are not visually updated in the cart when added or removed.

- The cart is displayed incorrectly until the user manually refreshes the browser page.

b. Chrome:

- After an item is added to the cart, it cannot be added again after being removed.

- If an item is added and then removed, it cannot be removed from the cart again if it was previously removed.

- Disabling the server cache resolves the issue of item removal.

- Manually refreshing the page does not help.

1. Video Case Example
2. A video demonstrating the current issue can be found at the following link: https://drive.google.com/file/d/1_kg4J49QAuToxo-Ba4oHoaVKnBRDENbt/view?usp=sharing
3. Proposed Solution
4. To fix the caching issue, developers should implement the following changes:

a. Investigate and identify the root cause of the caching issue in both Firefox and Chrome browsers.

b. Modify the app's JavaScript, CSS, HTML, and/or Python code as needed to ensure the correct cart behavior (adding, removing, and updating items) in both browsers.

c. Test the app with different caching configurations, including enabling and disabling WP Super Cache, and adding exceptions such as:

- ?add-to-cart=

- ?remove_item=

- ?removed_item=

- ?wc-ajax=

d. Verify that the cart functionality works as expected, even after adding and removing the same item multiple times.

1. Testing & Validation
2. After implementing the proposed solution, the app should be thoroughly tested to ensure that the caching issue is resolved. Testing should include:

a. Validating the correct behavior of adding, removing, and updating items in the shopping cart across multiple browsers (including Firefox and Chrome).

b. Confirmation that the issue does not reappear after multiple instances of adding and removing the same item.

c. Verifying that any applied caching configurations, including WP Super Cache, do not interfere with the desired cart functionality.

1. Conclusion
2. By addressing the technical requirements detailed in this document, developers can resolve the app's caching issues, improving the user experience and ensuring consistent and reliable shopping cart functionality across different browsers.