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I have an issue when on regular desktop PC without touch screen in any browser either it's Chrome, IE, Edge, or Mozilla I see that window object has ontouchstart property. This happens only on Windows version 1607 (Anniversary update) and does not happen on any other version of Windows 10.

I'm asking because in my code I used to detect if it's touch screen by line of code below

var isTouchScreen = !! ( ('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch || (navigator && navigator.maxTouchPoints));

But now in Windows 1607 this variable always returns TRUE even if I work on desktop PC without touch screen and that breaks a lot of logic in my code.

Does anybody know what's wrong with that particular Windows version?

BenM
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Vadym
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  • The test is not reliable, see https://developer.mozilla.org/en-US/docs/Web/Events/touchstart#Browser_compatibility A good post about the subject: https://stackoverflow.com/a/6447935/1169519 – Teemu Oct 24 '17 at 18:27
  • Some more posts at SO: https://stackoverflow.com/search?tab=votes&q=%5bjavascript%5ddetect%20touchscreen See also https://developer.mozilla.org/en-US/docs/Web/CSS/@media/pointer – Teemu Oct 24 '17 at 18:48

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