HTML examples: sometimes line counter collapses about bob HOT 7 CLOSED

Thanks for filing @ikarasz . This was also filed as mdn/kuma#6307 . Do you see this all the time or just intermittently?

from bob.

@wbamberg In the afternoon I noticed the issue on two different computers, now I cannot reproduce it on any of them.

from bob.

@wbamberg In the afternoon I noticed the issue on two different computers, now I cannot reproduce it on any of them.

😄 That is the fun ride we have also been having with this one. We also just did not have enough time to really dig into. it. It is tricky to figure out whether it is a Codemirror thing or just a race condition in our use of it.

from bob.

For me it happens very rarely, like once in a month. I found out that:
Element with classes "CodeMirror-gutter CodeMirror-linenumbers" has width set to 1px instead of 29px, which makes grey bar invisible.
Element with class "CodeMirror-sizer" has marign-left set to 0px instead of 30px. It makes whole content be aligned to side of the window, instead of to the side of grey bar.
Elements with classes "CodeMirror-linenumber CodeMirror-gutter-elt" have width set to 1px instead of 21px, which doesn't have any significant impact.
Elements with class "CodeMirror-gutter-wrapper" have property left set to 0px instead of -30px. It makes line numbers be shown on top of text, instead of on the side of it.

I will create an issue in Code Mirror repo, maybe they will know what to do. #6953

from bob.

I found out that element "editor" which is passed to CodeMirror, has offsetParent set to null and all getBoundingClientRect properties are 0 when this issue occurs. Same thing is true for that elements parent and for the body element. This is also true when editor is stripped of almost all JS code. Furthermore sometimes this is also true even after "load" event was fired by interactive example window.

On local env I was never able to reproduce this issue, but on MDN I figured out how to do it easily. I just open Array page and then open all of its methods in new tabs by using right click, usually 1 or 2 will have this problem.

@schalkneethling Any idea how is that possible?

from bob.

I had it happen to me just now, in a private browsing window on Windows 10. This is my browser information.

Microsoft Edge
Version 104.0.1293.54 (Official build) (64-bit)

from bob.

Closing in favor of #976.

from bob.