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<!doctype HTML>
<html class="reftest-wait">
<meta charset="utf8">
<title>Content Visibility: cross-origin iframe locking</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
<link rel="match" href="content-visibility-019-ref.html">
<script src="/common/reftest-wait.js"></script>
<script src="../resources/utils.js"></script>
<style>
div {
background: blue;
color: white;
}
.hidden {
content-visibility: hidden;
}
</style>
<div>Test passes if there is a box with no text below.</div>
<iframe id="frame" width=400 height=200 src='https://{{domains[www]}}:{{ports[https][0]}}/wpt_internal/display-lock/css-content-visibility/resources/frame.html'></iframe>
<div>Test passes if there is a box with no text above.</div>
<script>
async function runTest() {
document.getElementById("frame").classList.add("hidden");
requestAnimationFrame(takeScreenshot);
}
window.onload = () => {
requestAnimationFrame(() => {
requestAnimationFrame(runTest);
});
};
</script>
</html>
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