List of steps to reproduce
- Load category tree special page of Category:User interface extensions with mode all pages: https://www.mediawiki.org/wiki/Special:CategoryTree?target=Category%3AUser+interface+extensions&mode=all&namespaces=&title=Special%3ACategoryTree
- Expand Category:Ajax extensions which contains 46 pages.
What happens?:
Is shows nothing found.
The AJAX call is:
https://www.mediawiki.org/w/api.php?action=categorytree&format=json&category=Ajax_extensions&options={%22mode%22%3A0%2C%22hideprefix%22%3A20%2C%22showcount%22%3Atrue%2C%22namespaces%22%3Afalse%2C%22notranslations%22%3Afalse}&uselang=en&formatversion=2 with mode=0.
What should have happened instead?:
It should show the 46 pages of the category.
The AJAX call should be:
https://www.mediawiki.org/w/api.php?action=categorytree&format=json&category=Ajax_extensions&options={%22mode%22%3A20%2C%22hideprefix%22%3A20%2C%22showcount%22%3Atrue%2C%22namespaces%22%3Afalse%2C%22notranslations%22%3Afalse}&uselang=en&formatversion=2 with mode=20.
Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc:
I bisect the lost of this feature to change rECTRc839756b32ed: Remove 'wgCategoryTreePageCategoryOptions' export from pageview HTML by @Krinkle.