Template:Category handler/blacklist/doc

This is the category handler/blacklist sub-template.

Do not use this template directly, use category handler instead. This template is called from category handler, see user documentation there.

But if you came here to see or update the category suppression blacklist, then you are in the right place.

Updating the blacklist
This template contains a blacklist of the pages and page types where templates should not auto-categorize. This blacklist is used by category handler to decide when not to categorize. To update the blacklist, edit this template.

This template uses if pagename to do the pagename-detection, thus see if pagename for the syntax to use for the blacklist rules.

When this template is placed on a page that should not categorize, then it should return "hide". And when placed on any other page it should return an empty string.

Testing the blacklist
There are two ways you can test what this blacklist returns for a page:

You can put this template on the page you want to test, and see what output it produces. You can use edit preview, no need to save. Like this:



Which here on this page returns this:



The ++ used here is a simple way to make it visible when a template returns an empty string.

Or you can feed the page name you want to test to this template. Like this:

Which returns this:



Technical details
Currently this template is only called from category handler, and indirectly from all templates that use category handler. But in the future this template might also be directly called from other templates similar to category handler. This means we can update the category suppression blacklist in one place.