The ratio between physical pixels and logical CSS pixels.
devicePixelRatio from quirksmode. More about devicePixelRatio from quirksmode.
final num devicePixelRatio
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-html/Window/devicePixelRatio.html