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Modernizing Drupal 10 Theme Development: The Ultimate Guide (PDF Inside)
- Use Twig component templates with render arrays or preprocessed variables; avoid heavy logic in Twig.
- Prefer small, focused CSS files imported per component to reduce global scope.
- Progressive enhancement: ensure pages work without JS; enhance interactions with JS modules.
- Use Drupal libraries.yml to register assets and attach them per component or route, not globally.
Use visual regression testing to ensure your updates don't accidentally break existing layouts. 4. Moving Toward Decoupled Architectures
Drupal 10.1+, Single Directory Components
Introduced experimentally in Drupal 9 and stable in is the single most important modernization tool. modernizing drupal 10 theme development pdf
% include 'card' with title: label, image_uri: content.field_image, url: url, content: content.body % Modernizing Drupal 10 Theme Development: The Ultimate Guide