The live examples for mw.widgets.DateInputWidget.js and DateTimeInputWidget.js aren’t working. This is because their respective files aren’t loaded in maintenance/jsduck/eg-iframe.html. The DateInputWidget for example would need:

<script src="modules/lib/moment/moment.js"></script>
<script src="modules/src/mediawiki.widgets/mw.widgets.CalendarWidget.js"></script>
<script src="modules/src/mediawiki.widgets/mw.widgets.DateInputWidget.js"></script>

It would also need its styles, which are in Less, so will need to converted first, in the postdoc npm script.

The same would apply to mw.widgets.CategoryCapsuleItemWidget and others (once examples are added to them).

Apart from these, there are only two other @examples in MediaWiki core, which are in mediawiki/mediawiki.js which is being included. All of OOUI is also included in eg-iframe.html so that examples in Core → Upstream → OOUI continue to work.