: Instead of splitting a component's Twig, CSS, and JS across multiple directories, SDC keeps them in one folder (e.g., themes/custom/my_theme/components/card/ ).
Modern theming isn't just about assets; it's about efficient rendering. modernizing drupal 10 theme development pdf
Follow the official Drupal Theming Guide for standards on .info.yml file definitions and Twig best practices . : Instead of splitting a component's Twig, CSS,
For over a decade, Drupal themes relied on jQuery for DOM manipulation and Ajax. In Drupal 10, jQuery is no longer a dependency for core JavaScript behaviors. Modern theming means removing jQuery entirely, leveraging native querySelector , fetch , and web components. and JS across multiple directories
Use the once library to attach behaviors only once:
css: theme: css/style.css: {} js: js/script.js: {}