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Is it possible to tell if a device is connected to more than one monitor? I looked up everywhere but couldn't find anything useful.

Chain-RXN
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    javascript is a client web language why do you not use a system language like shell or bash or dos .... which is more for these kind of action ? – jeremy-denis Aug 24 '20 at 14:35
  • No, I don't think this is possible. – evolutionxbox Aug 24 '20 at 14:37
  • @jeremy-denis I would assume this is for a webapp feature. A shell won't help there. (But then the question doesn't say anything like that) – evolutionxbox Aug 24 '20 at 14:38
  • I didn't find the answer I needed anywhere on StackOverflow, so responding late to the several related threads here. The solution is, first, check for second display with `window.screen.isExtended`. Then `await window.getScreenDetails()`, which returns an object that includes an array of screens. Very thorough explanation here: https://web.dev/multi-screen-window-placement/ – Lou Groshek Jun 21 '22 at 20:46

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