Eco Mode

The Eco Mode module introduces an eco-friendly dimension to Drupal sites, providing a base framework to add various sustainability features through additional sub-modules. While the main module doesn't directly implement optimizations, it establishes groundwork for specific functionalities that sub-modules like Eco Mode Image and Eco Mode Media can build on.

Eco Mode manages the "eco" state using cookies to store visitor choices and offers admin management tools.
It provides a block that allows site placement of an eco-mode toggle button, including a configurable information banner with options for banner text, text color, and background color.
The banner can be set to display when server response times are slow, based on customizable thresholds.

The module relies on a cookie-based cache context (cookie), which is incompatible with static caching mechanisms. To ensure proper functionality, the Drupal static page cache must be disabled, while the dynamic page cache should remain active.

The Eco Mode Image sub-module optimizes image resource usage by managing image display options.
It allows per-field control to hide images, reducing resource consumption and DOM size. A Lazy Builder support extends field formatters to use lazy loading, avoiding cache duplication.

Compatible with the SVG Image module.

The Eco Mode Media sub-module applies similar functionality to media entity reference fields with configurations specific to media entities.