What Is My Device Pixel Ratio, CSS Width and CSS Height?
Modern browsers offer Mobile Device Viewport Mode,Device Settings, Emulated Devices or Device Mode to approximate how your page looks and performs on a mobile device. But most of them offer limited amount of devices! In this page you can find your device's CSS width or ("device-width"), CSS height or ("device-height"). and device pixel ratio (devicePixelRatio)
Device Pixel Ratio (DPR)
CSS Width ("device-width") And CSS Height ("device-height")
Mobile devices, in Responsive Web Design, relate to a core value which is the value of CSS width or ("device-width"), in CSS Device Independent Pixels, which depends both of the browser and user zoom settings.