862557 - Touch events not firing if mouse event set to preventDefault on the same element.

Status: RESOLVED DUPLICATE of bug 819102

(Firefox :: Untriaged, defect)

Description

[Eric Noble]

User Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:20.0) Gecko/20100101 Firefox/20.0
Build ID: 20130409194949

Steps to reproduce:

Here is a JS Fiddle which shows the problem:
http://jsfiddle.net/859jT/31/

Working on Windows 8 machines with both mouse and touch support.  I touch an element that has both mousedown and touchstart event listeners.  The mousedown listener calls preventDefault on the event.


Actual results:

No touch events are received.  Also, touching on a sibling element that doesn't call prevent default on its mouse events makes the first element now receive touch events.  See JS Fiddle for more information.


Expected results:

Calling prevent default on a mouse event should have no bearing on touch events.

Comment 1

[Paul Oiegas [:poiegas], PM for (Ecosystem QA, Services QA, WebCompat QA, Ads QA, and Solo QA teams)]

Hi Eric,

I have tested this issue using your test case on latest Firefox release (43.0.4), latest Nightly build (46.0a1-20160112030227) and managed to reproduce it on both Windows 8.1 and Windows 10. Any touch event is seen as mouse only. Even if I performed your mentioned strange behavior, I still could not get a touch event. Verified the same test case on Chrome and it correctly works.
Performed the tests on a Dell XPS 12 laptop 2 in 1 with both mouse and touch capabilities.  

Still I made some diggings in Bugzilla and I found an older issue that is addressing the same problem. Considering this I will mark this one as duplicate of the older one. You can follow the progress there.

Thanks,
Paul