Sources & Maintenance

Drupal Research Install

Path: /home/camoa/workspace/contrib/web/

Web Sources

Source	URL	Guide Sections	Last Verified
Drupal.org - Including Default Image Styles With Your Theme	https://www.drupal.org/docs/8/theming-drupal-8/including-default-image-styles-with-your-theme	Creating Styles, Config Export	2026-02-14
Drupal.org - Responsive Images in Drupal	https://www.drupal.org/docs/mobile-guide/responsive-images-in-drupal	Responsive Config, Art Direction	2026-02-14
Drupal.org User Guide - Concept: Image Styles	https://www.drupal.org/docs/user_guide/en/structure-image-styles.html	Overview, Schema	2026-02-14
Drupal.org User Guide - Concept: Responsive Image Styles	https://www.drupal.org/docs/user_guide/en/structure-image-responsive.html	Responsive Config, Breakpoints	2026-02-14
Specbee - 8 Ways to Optimize Images in Drupal (Core Web Vitals)	https://www.specbee.com/blogs/optimize-images-in-drupal-for-core-web-vitals	WebP/AVIF, Best Practices, Security	2026-02-14
Specbee - Setup Responsive Images in Drupal 9	https://www.specbee.com/blogs/setup-responsive-images-in-drupal-9	Responsive Config, Breakpoints, Art Direction	2026-02-14
Drupal.org - ImageAPI Optimize AVIF & WebP Module	https://www.drupal.org/project/imageapi_optimize_avif_webp	WebP/AVIF	2026-02-14
W3C - HTML5 Embedded Content Spec (sizes attribute)	https://www.w3.org/html/wg/drafts/html/master/embedded-content.html#attr-img-sizes	Art Direction	2026-02-14
W3C WAI - Understanding Non-Text Content (WCAG)	https://www.w3.org/WAI/WCAG21/Understanding/non-text-content.html	Anti-Patterns	2026-02-14
Drupal.org Security Documentation	https://www.drupal.org/docs/security-in-drupal	Security	2026-02-14
Golems GABB - Image Optimization Guide (Drupal Image Styles & Responsive Images)	https://gole.ms/guidance/image-optimization-action-guide-drupal-image-styles-responsive-image-styles	Overview, WebP/AVIF, Best Practices	2026-02-14

Code Sources

Module/Theme	Relative Path	Guide Sections	Drupal Version
Image module	core/modules/image/	Overview, Schema, Effects, Creating Styles, Formatters, Programmatic, Security, Code Reference	11.x
Responsive Image module	core/modules/responsive_image/	Overview, Responsive Config, Breakpoints, Formatters, Art Direction, Code Reference	11.x
Olivero theme	core/themes/olivero/	Breakpoints, Code Reference	11.x
Standard profile	core/profiles/standard/	Responsive Config, Code Reference	11.x
Core recipes	core/recipes/standard_responsive_images/	Config Export, Code Reference	11.x
Breakpoint library	core/lib/Drupal/Core/Breakpoint/	Breakpoints, Code Reference	11.x
Image toolkit library	core/lib/Drupal/Core/ImageToolkit/	Effects, WebP/AVIF, Code Reference	11.x

Version History

Version	Date	Changes
1.0	2026-02-14	Initial guide creation. Configuration-first approach. 16 atomic sections covering image styles, responsive images, all 8 core effects, field formatters, WebP/AVIF optimization, security, and performance.