javascript window.devicePixelRatio 浏览器支持
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window.devicePixelRatio browser support
提问by ccdavies
I have been looking around the web to find what browser support there is for window.devicePixelRatio, without much luck.
我一直在网上寻找什么浏览器支持 window.devicePixelRatio，但运气不佳。
Does anyone know what browers/devices support this?
有谁知道什么浏览器/设备支持这个？
回答by Alexander
According to thisblog post : ( from 2012 )
根据这篇博文：（从 2012 年开始）
window.devicePixelRatiois mostly trustworthy on most browsers.- On iOS devices, multiply
devicePixelRatiobyscreen.widthto get the physical pixel count. - On Android and Windows Phone devices, divide
screen.widthbydevicePixelRatioto get the dips count.
window.devicePixelRatio在大多数浏览器上大多是值得信赖的。- 在iOS设备上，乘
devicePixelRatio用screen.width得到的物理像素数。 - 在Android和Windows Phone设备，除
screen.width通过devicePixelRatio获得逢低计数。
2017 UPDATE:
2017年更新：
This property returns the ratio of the resolution in physical pixels to the resolution in CSS pixels for the current display device. This value could also be interpreted as the ratio of pixel sizes: the size of one CSS pixel to the size of one physical pixel.
此属性返回当前显示设备的物理像素分辨率与 CSS 像素分辨率的比率。这个值也可以解释为像素大小的比率：一个 CSS 像素的大小与一个物理像素的大小。
Desktop browsers support:
桌面浏览器支持：
Chrome Edge Firefox Internet Explorer Opera Safari 49 (Yes) 49 11 41 9.1
Mobile Browsers:
移动浏览器：
Android Edge Firefox IE Mobile Opera Safari Mobile 4.4 (Yes) ? ? all 9.3
