Twinkle.diff assumes the newer revision is always on the right

[he7d3r]

Although the newer revision is usually on the right, it may also be on the left. Compare the value of the code var oldid = /oldid=(.+)/.exec($('#mw-diff-ntitle1').find('strong a').first().attr("href"))[1]; on these cases:

1. https://en.wikipedia.org/w/index.php?title=Example&diff=486460758&oldid=451042477
2. https://en.wikipedia.org/w/index.php?title=Example&diff=451042477&oldid=486460758

In the first case, it gets the id of the most recent but on the second it gets the id of the older revision.

[QEDK]

So, my question is how does it matter? There's no problem.

[he7d3r]

Hmm... in the current form the "oldid" matches the one which appears both in the URL and the "permanent link" in the sidebar.

[QEDK]

Well, I prefer to get those manually.

[atlight]

So you're saying that "current" doesn't work as expected? To be honest, no-one can really remember what the "expected" behaviors of "current/since/since mine" were supposed to be... I guess this can be considered a bug on the grounds of inconsistent behavior, though.

@helder-git: What do you think should be happening instead?

[Amalthea]

Per the specification in my head the current behavior is actually correct. :)

[atlight]

We should probably document these at WP:TW/DOC... that would help end-users to know what they do (at the moment, all they have is the tooltip), and also help us to know when they are not working as "expected"...

[atlight]

I don't think anyone is going to ever fix this bug. I don't understand what the hell current/since/since mine are even supposed to do, and Amalthea thinks the current behaviour is OK...

@he7d3r, would you like to elaborate to help get to the bottom of this?

[he7d3r]

I guess it is working as intended then...