Carousels PT:III
This type of carousel uses JavaScript, the slick library and the lazysizes library to lazy load the images.
Lazy load will cause the carousel items to show thumbnails (low res) before high resolution versions load. Each image has a 100x56px thumbnail version as well as a 950x534px higher resolution version.
All types of carousel can be implemented in this way giving the impression that content is loading faster.
For more information please visit lazysizes