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madrobby/gist:3161015

Created July 22, 2012 20:43
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Detect retina support. Tested on iOS, Android 2.x, Chrome for Android, Safari on MacBook Pro Retina, Firefox mobile (beta) for Android, Opera Mobile (Android)
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gistfile1.js
function isRetina(){
return (('devicePixelRatio' in window && devicePixelRatio > 1) ||
('matchMedia' in window && matchMedia("(min-resolution:144dpi)").matches))
}
@madrobby
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I have updated the gist and moved away from the moz-specific check and test for min-resolution:144dpi. This works on Firefox (beta) on the Nexus 7, where as all other approaches (moz--min-device-pixel-ratio and min-resoution:1.5dppx) didn't.

@noamtm
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noamtm commented Aug 29, 2012

Also works on Chrome on MacBook Pro Retina (where window.devicePixelRatio==2).

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