<!DOCTYPE html> | |
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility"> | |
<link rel="help" href="https://crbug.com/1197492"> | |
<map> | |
<ul></ul> | |
<progress></progress> | |
<iframe></iframe> | |
</map> | |
<style> | |
body, map, ul, progress { | |
content-visibility: auto; | |
height: 0vw; | |
} | |
</style> |