With the release of Drupal, an important rendering behavior has changed for block content render arrays. If your custom modules or themes rely on #attributes in block render arrays, this update may affect your frontend output.

The change was introduced in the Drupal core issue:

“Attributes of a block content are applied to block itself” (#2486267)

This article explains what changed, why it matters, and how to update your code correctly.

Implementing a Real-World Feature Across Drupal, Symfony, and Laravel

Feature: E-Commerce “Discount Code Validator”

Requirement:

• When a user applies a discount code during checkout:
  • Validate the code
  • Check expiration and usage limits
  • Calculate discount
  • Return an updated order total
• Must be extensible for future promotion types

This feature is small but touches services, events, plugins, and DI—perfect for comparing modular approaches.