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<!DOCTYPE html>
<html class=reftest-wait>
<title>View transitions: use css tags for shared elements</title>
<link rel="help" href="https://github.com/WICG/view-transitions">
<link rel="author" href="mailto:vmpstr@chromium.org">
<link rel="match" href="css-tags-shared-element-ref.html">
<script src="/common/reftest-wait.js"></script>
<style>
div { contain: paint; }
#left {
background: green;
width: 100px;
height: 100px;
position: absolute;
top: 50px;
left: 50px;
}
#right {
width: 50px;
height: 50px;
background: blue;
position: absolute;
top: 50px;
left: 250px;
}
.left-tag {
view-transition-name: left-element;
}
.right-tag {
view-transition-name: right-element;
}
.hidden {
background: pink;
width: 10px;
height: 10px;
view-transition-name: hidden;
}
html::view-transition-group(hidden) { animation-duration: 300s; }
html::view-transition-image-pair(hidden) { animation: unset; opacity: 0; }
html::view-transition-group(left-element),
html::view-transition-group(right-element) { animation-duration: 0s; }
html::view-transition-new(left-element),
html::view-transition-new(right-element) { animation: unset; opacity: 0; }
html::view-transition-old(left-element),
html::view-transition-old(right-element) { animation: unset; opacity: 1; }
html::view-transition-group(root) { animation: unset; opacity: 0; }
html::view-transition { background: lightpink; }
</style>
<div id=left class="left-tag"></div>
<div id=right class="right-tag"></div>
<div id=hidden class=hidden></div>
<script>
failIfNot(document.startViewTransition, "Missing document.startViewTransition");
async function runTest() {
document.startViewTransition(() => {
left.classList.remove("left-tag");
left.classList.add("right-tag");
right.classList.remove("right-tag");
right.classList.add("left-tag");
requestAnimationFrame(() => requestAnimationFrame(takeScreenshot))
});
}
onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
</script>
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