Please note that this plugin has been abandoned.
It was done as a proof-of-concept, and was not thoroughly tested. It has been reported that it breaks AJAX queries, and I feel it's best suited for theme developers to apply lazy loading in a pragmatic way in their theme, as opposed to using a plugin to blindly add it to all images. Please feel free to fork and continue working on this plugin if you find it useful.
Makes Winter CMS pages lazy-load images by default. This uses the loading="lazy" attribute that is available as part
of the HTML Living Standard and
is available in all modern browsers, except Safari, since early 2020.
To prevent layout shifting, this attribute is only added automatically to images that have a defined width and
height attribute. It will also ignore any images that have specified their own loading attribute as well, allowing
developers to control the loading attribute as necessary.
A new setting is made available to the Pages form, Lazy load images, which allows developers to disable lazy loading on a per-page basis.