Have you wondered if you should use px, em or rem for media queries? I had the same question too, and I never figured it out, not till now. When I first created the mappy-breakpoint library, I used rem units. Then after a conversation with Sam Richard, I quickly switched to em instead because I found out there isn’t a difference between the two. In addition to em and rem, a popular unit of choice
![PX, EM or REM Media Queries? | Zell Liew](https://cdn-ak-scissors.b.st-hatena.com/image/square/a7ef6df7c4c435e7a74e4896028af4b511371356/height=288;version=1;width=512/https%3A%2F%2Fzellwk.com%2Fimages%2Fzell%2Fzell-profile-pic.jpg)