optimized it for readability, performance, and best practices.

[Anshuman7080]

Function for Updating Product Details: Moved the product details update logic into a separate function (updateProductDetails) for better readability and to avoid code duplication.

Optional Chaining: Used optional chaining (?.) when accessing color codes to handle potential undefined values gracefully.

Improved Event Listeners: Simplified the event listener logic for sizes to reduce redundancy.

Initialization Call: Added an initial call to updateProductDetails to ensure that the first product is displayed when the script runs.

General Readability: Cleaned up the code for better readability and maintainability