What is dots-per-CSS-inch and dots-per-physical-inch
问题 I've received this message from Chrome Developer Tools console tab when access jsfiddle.net: Consider using 'dppx' units instead of 'dpi', as in CSS 'dpi' means dots-per-CSS-inch, not dots-per-physical-inch, so does not correspond to the actual 'dpi' of a screen. In media query expression: only screen and (-webkit-min-device-pixel-ratio: 2), not all, not all, only screen and (min-resolution: 192dpi), only screen and (min-resolution: 2dppx) It's in blue color so I'm assuming that's not a