4 <title>Content Visibility: spacer and a container (reference)
</title>
5 <link rel=
"author" title=
"Vladimir Levin" href=
"mailto:vmpstr@chromium.org">
6 <link rel=
"help" href=
"https://github.com/WICG/display-locking">
12 background: lightblue;
15 contain: style layout;
21 <div class=
"spacer"></div>
22 <div id=
"container"></div>