This has been long-provided on Wikia (see https://community.wikia.com/wiki/Help:Galleries,_Slideshows,_and_Sliders ) and makes for a compact way to show a large number of potentially-interesting images without dominating an article/page. Provide this as "just" another `<gallery>` mode type with some clean simple styling.
**Goals**
* Have an interactive element in the article
* Surface more multimedia
* Attractive to users
* Ability to have large galleries. Currently editors limit the images in a gallery because it takes up too much space.
* Have a fixed size component on the page. For eg, hero slider or a thumbnail sized gallery. //(related to above)//
* Possibly have auto generated galleries using–
** Wikidata queries
** Categories on Commons
* Better mobile support
** Mobile web shows images one after the other vertically. See F3613649.
** Android app does the same but removes image borders and margins. See F3613655.
**Open issues**
* Making sure this works in bother the Parser and Parsoid, and is nicely backwards-compatible.
* How should video and audio object work here?
* Not sure what to do in no-JS or print mode; probably fall back to regular gallery operation?