1556236 - elementfrompoint doen't work properly when page is zoomed

Status: RESOLVED INCOMPLETE

(Firefox for Android Graveyard :: General, defect, P3)

Description

[david.sillou]

Attachment: zoom (3 times or more), center the third div, tap third div, see result in console

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Steps to reproduce:

1. Put target divs on a simple page (see attached file)
2. zoom in (pinch)
3. Pan to move a target div past the new innerWidth and/or innerHeight value (modified bt zoom)
4. call elementFromPoint with x and y within the target div

Actual results:

elementFromPoint returns html element

NB : it seems to occur as soon as targeted element's position is beyond innerWidth and/or innerHeight

Expected results:

elementFromPoint should return targeted element whatever the scale/value zoom of the page is

Comment 1

[Diana Rus]

Hi, I reproduce the issue with device Sony Xperia Z5 (Android 7.0) on build Firefox Nightly 70.0a1 (2019-08-07).
Screenshot attached.
I will mark the ticket as NEW.

Comment 2

[BMO Automation]

We have completed our launch of our new Firefox on Android. The development of the new versions use GitHub for issue tracking. If the bug report still reproduces in a current version of [Firefox on Android nightly](https://play.google.com/store/apps/details?id=org.mozilla.fenix) an issue can be reported at the [Fenix GitHub project](https://github.com/mozilla-mobile/fenix/). If you want to discuss your report please use [Mozilla's chat](https://wiki.mozilla.org/Matrix#Connect_to_Matrix) server https://chat.mozilla.org and join the [#fenix](https://chat.mozilla.org/#/room/#fenix:mozilla.org) channel.