UserCheck

UserCheck displays a table with informations about a certain user, such as registration date, gender, user rights, etc.

Installation
Add the following to your w:Special:Mypage/global.js, Special:Mypage/common.js or your wiki's MediaWiki:Common.js:

Utilization
The script is just an advanced UserInfo with more information, ability to check on other user, not just on yourself, and now, making a page for it to work is not necessary. The script works on Special:UserCheck. A link to the page is added in the toolbar. There, the page will ask for a name and the check begins. An button is added for ReCheck so you don't have to refresh the page to check someone else. Another method is on the user's contributions page. A button is added after the logs named "AJAX UserCheck". An modal appears, the username is autofilled and the check begins.

(Note, while in the code.js, the script is named as CheckUser or UserCheck, the ability should not be confused with Fandom Staff's CheckUser ability.)