981306 - CSS transition animation lags with document.body or document.body.parentNode

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[/\/\arcio Galli]

This seems to be a regression for me since I recall it used to have a smooth transition. The case is when you apply a scale transformation, with animation (CSS transition) to the body or the documentElement. 

My testcase: 
http://www.mgalli.com/development/transitionbody/doctrans.html

Expect: 
Smooth animation. 

What happens: 
Lags/breaks. 

Use case: some apps may attempt to apply transformations to the HTML and body tag so they can create camera effects (video observation) without the need of adding extra tags to the markup. This allows for a zoom in/out navigation model.

Comment 1

[Markus Stange [:mstange]]

Attachment: reduced testcase

Comment 2

[Alice0775 White]

Regression window(m-i)
Good:
http://hg.mozilla.org/integration/mozilla-inbound/rev/0d771761b9b3
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20121230 Firefox/20.0 ID:20121230093651
Bad:
http://hg.mozilla.org/integration/mozilla-inbound/rev/e7eb5d695818
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20121230 Firefox/20.0 ID:20121230144652
Pushlog:
http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=0d771761b9b3&tochange=e7eb5d695818

Regressed by: Bug 816359

Comment 3

[/\/\arcio Galli]

Also noticed when you take away the overflow:hidden, it smooths better: 

http://www.mgalli.com/development/transitionbody/red2.html

Comment 4

[Cosmin Muntean [:cmuntean], Ecosystem QA]

Firefox: 45.0.1, Build ID: 20160315153207
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0

Hi Galli,

I have tested this issue on the latest Firefox (45.0.1) release, latest Nightly (48.a01 - Build ID: 20160322030417) build bud I could not reproduce it. I have used the provided test cases from comment 1 and comment 3, but the animation has no lag. 

Is this still reproducible on your end ? If yes, can you please retest this using latest Firefox release and latest Nightly build (https://nightly.mozilla.org/)and report back the results ? When doing this, please use a new clean Firefox profile, maybe even safe mode, to eliminate custom settings as a possible cause (https://goo.gl/PNe90E). 

Thanks,
Cosmin.

Comment 5

[Cosmin Muntean [:cmuntean], Ecosystem QA]

Considering the fact that I cannot reproduce this and the fact that the reporter did not answered to my request until now, I will mark this as Resolved-Worksforme.
If anyone can still reproduce it, feel free to reopen the issue and provide more information.

Thanks,
Cosmin.