Bug 159763 – click events not fired depending on DOM changes?

• Status: NEW
• Component: UI Events

[Rick Byers]

According to https://developer.apple.com/library/ios/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html#//apple_ref/doc/uid/TP40006511-SW6 I should see click events whenever tapping inside an element with a click listener.  I swear this used to work reliably but now I'm seeing something I'm having trouble explaining:

Repro:
- Visit http://rbyers.net/eventTest.html
- Ensure only ' mouse' is enabled in the configuration
- Tap a few times - in the log or on the squares on the right
- Most taps generate mousemove/mousedown/mouseup/click events
- Now enable 'touch' from the list of events to monitor and tap again
- Now you only get the 'mousemove' events - no down/up/click.  This occurs no matter where you tap (even outside the log whose DOM content is changing).

Simpler repro that demonstrates something similar:
 - https://output.jsbin.com/nirihe
 - tap in any of the different clickable areas above the log box
 - notice you consistently get 'click' events
 - now tap inside the log box
 - get only touchstart/mousedown - even though you still see the tap highlight showing that the clickable target is being activated.

I don't remember seeing this before - any chance something changed in iOS 9?  I'll install iOS 10 beta to try that.