Limited availability
This feature does not work in some of the most widely-used browsers.
Chrome
Edge
Firefox
Safari
us:auser-select: all;us:autouser-select: auto;us:noneuser-select: none;us:tuser-select: text;Media Queries
Prefix a class with a breakpoint to apply it from that width up.
Pseudo Classes
Prefix a class with a state to apply it only while that state matches.