I don't think this page is useful. The while block is already mentioned in the "nonexistent blocks" section of List of Block Workarounds, and it really doesn't merit an article of its own. I'll do a quick copy-paste of the page creation notes:
|“||Most importantly, this means that the subject of your article must be...
This meets only the second criterion. This block is neither widely notable (a major portion of users don't know or care) nor not about user-generated content (the idea was user-generated).
總而言之，this article should be deleted.
kenny2scratch 10:33, 27 December 2017 (UTC)