809208 - Element's offsetTop value changes when parent node gets style transformation

Status: RESOLVED INVALID

(Core :: DOM: CSS Object Model, defect)

Description

[mgalli]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_0) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4

Steps to reproduce:

Tests for the sample: 

http://www.telasocial.com/labs/offsettop.html

Which is: 

* JS applies a style transform translate to the body 
* JS checks the value of offsetTop for inner element 


Actual results:

Value of offset top has changed. 



Expected results:

Value of offsetTop to keep the same.

Comment 1

[mgalli]

I am marking this bug resolved as invalid after advice from Boris. It turns out that Gecko disables margin collapsing when body gets the transformation. This changes the body padding which affects the calculations for offsetTop/Left. 

BTW webkit behavior is not the same as Gecko.