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by andreash 4098 days ago
I think the "Pixels vs ems" was a bit short. Anyone?http://primercss.io/guidelines/
1 comments

Yeah, I thought rems were the new thing?
All of GitHub is basically in pixels, save for our Markdown styles—for easy modification across devices, we use `em`s. It'd be a huge project to update that to `rem`s anytime soon.
If you'd make it from scratch today, what technique would you use? html {font-size:62.5% } with REM?
Set an HTML font-size—likely 16px—and use body { font-size: 1rem; }. Allows for easy media query scaling of type.