You can use the alt code: https://w.wiki/_mzo2

There's no regression here. The resolution of T221016 was to support aliasing, not remove $ from the id set. (Which was deemed technically infeasible)

Since $ is still in the id set, shortcodes that may contain it will continue to be generated. You should use the provided alt code, when you want use it on platforms where the $ char causes linking issue.

Why are we giving endusers a non-alt code in that case? This shouldn’t be up to a user to have to figure out. User press button, user get link, link always work, is the only valid path here I think…

OK, if you shorten url on wiki, both codes will be shown.

The above code seems to be generated at https://query.wikidata.org. WQS uses the shortenurl API but it seems it only shows the canonical code as its result. The alt is discarded. The API itself always returns both codes.

The answer looks to be:

			if ( data && !data.error && data.shortenurl && data.shortenurl.shorturlalt ) {
				text = data.shortenurl.shorturlalt;
			} else if ( data && !data.error && data.shortenurl && data.shortenurl.shorturl ) {
				text = data.shortenurl.shorturl;
			} else {
				text = wikibase.queryService.ui.i18n.getMessage( 'wdqs-app-urlshortener-failed' );
			}