For a small subset of Covers blocks we have a script that adds a slick slider. Specifically for "Content Covers" style, and only if there are more than 3 items.

It looks like this stopped working a long time ago, so currently the slick slider is not actually used by the block. To reduce blocking resources we'll remove the script  in https://jira.greenpeace.org/browse/PLANET-5503.

We can assess whether it's still worth adding this script for such a small amount of cases. Could be the same behavior can be achieved without an external dependency.