Feature Description

When an image is in the initial viewport but is hidden, it should get fetchpriority=low. For example, this would apply to images which appear inside of a mega menu or images which are part of hidden carousel slides. Such images should not get loading=lazy since they should still be loaded and ready to go the moment the user interacts with the page to reveal it, but they should not get the same priority as images which are visible when first loading the page.

See https://web.dev/articles/fetch-priority#lower-carousel-priority