QUEST
0
When the zooming factor is exactly 100%, one CSS pixel equals one device pixel (though the upcoming intermediate layer will take the place of device pixels here.) The image below depicts that.
05/15/17
1
The reason that CSS pixel ratio was created is because as phones screens get higher resolutions, if every device still had a CSS pixel ratio of 1 then webpages would render too small to see.
05/15/17
0
devicePixelRatio is the ratio between physical pixels and device-independent pixels (dips) on the device. devicePixelRatio = physical pixels / dips
05/15/17