File: content-visibility-auto-shared-element-ref.html

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<!DOCTYPE html>
<html>
<title>View transitions: offscreen content</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:vmpstr@chromium.org">
<style>
body { background: pink }
.flex {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: flex-start;
}
.box {
  width: 100px;
  height: 500px;
  contain: paint;
  background: green;
  border: 1px solid black;
  box-sizing: border-box;
}
.vis-hidden {
  visibility: hidden;
}
.cv-hidden {
  content-visibility: hidden;
}
</style>

<div class=flex>
 <div class="box vis-hidden">ancestor c-v</div>
 <div class="box cv-hidden">self c-v</div>
 <div class="box cv-hidden">descendant c-v</div>
</div>