[Webkit-unassigned] [Bug 139681] Touch support is reported even when the device doesn't have a touch screen

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=139681

David Gasperoni <mcdado at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |mcdado at gmail.com

--- Comment #14 from David Gasperoni <mcdado at gmail.com> ---
I was wondering if `'ontouchstart' in document.documentElement` should return true when in Responsive Design Mode. It would make sure many libraries (including Boostrap 3) are going to behave like on mobile Safari.

I was trying to debug a situation where a `.dropdown-backdrop` had higher z-index than `.dropdown-menu` (my fault) and I couldn't reproduce it in Safari (neither 10.1.2 or TP 38) while I could in Firefox 56.0b5. In Firefox's responsive mode, `'ontouchstart' in document.documentElement` return true when the page is loaded with a touch-enabled profile.

Maybe that would be an interesting proposition.

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