LayoutTests/animations/keyframe-rem-unit.html - WebKit - Git at Google

 <!DOCTYPE html>
 <style>
 div {
   animation: anim 16ms linear forwards;
 }
 @keyframes anim {
     0% {
         font-size: 6rem;
     }
     100% {
         font-size: 6rem;
     }
 }
 </style>
 <div>Hello world!</div>
	<!DOCTYPE html>
	<style>
	div {
	animation: anim 16ms linear forwards;
	}
	@keyframes anim {
	0% {
	font-size: 6rem;
	}
	100% {
	font-size: 6rem;
	}
	}
	</style>
	<div>Hello world!</div>