As of Icd7fd1ac (included in MW 1.22) the .close() method is exposed; other methods are not, though. That patch originally aimed to expose the entire object, but Krinkle suggested not to do that.

I'm using one with autoHide:false to report on progress while a brief operation is ongoing. To do this I'm adding a click() handler to the notification's div, so I can abort the operation if the user closes the notification. I guess it would also meet my needs if I could give an onclose() callback to mw.notify().

But I'd say expose the object. It would let developers do more creative things with the notifications.

I guess this bug just needs a decision from Krinkle then?

I say let's consider what we have here a consensus and just do it. :D

Change 110667 had a related patch set uploaded by Bartosz Dziewoński:
mediawiki.notification: Return the Notification object from .notify calls

https://gerrit.wikimedia.org/r/110667

Change 110667 merged by jenkins-bot:
mediawiki.notification: Return the Notification object from .notify calls

https://gerrit.wikimedia.org/r/110667