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Test Info:

<!DOCTYPE html>
<html class="reftest-wait">
<meta charset="utf-8">
<meta name="title" content="Test that a clipper clips the view transition">
<meta name="author" content="mailto:vmpstr@chromium.org">
<link rel="match" href="clipper-non-containing-block-ref.html">
<script src="/common/reftest-wait.js"></script>
<script src="/web-animations/testcommon.js"></script>
<style>
.clipper {
overflow: clip;
width: 100px;
height: 100px;
}
#target {
width: 200px;
height: 300px;
background: blue;
}
::view-transition-group(*) {
animation-play-state: paused;
}
::view-transition-old(*) {
animation: unset;
opacity: 1;
}
::view-transition-new(*) {
animation: unset;
opacity: 0;
}
#target.after {
background: red;
}
</style>
<div class=clipper>
<div id=target></div>
</div>
<script>
failIfNot(target.startViewTransition, "Missing element.startViewTransition");
function runTest() {
target.startViewTransition(() => {
target.classList.add("after");
}).ready.then(takeScreenshot);
}
waitForCompositorReady().then(runTest);
</script>