File: content-visibility-023.html

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<!doctype HTML>
<html class="reftest-wait">
<meta charset="utf8">
<title>Content Visibility: hidden iframe</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-023-ref.html">
<meta name="assert" content="content-visibility hidden iframe paints when hidden is removed">

<script src="/common/reftest-wait.js"></script>

<style>
div {
  background: blue;
  color: white;
}
.hidden {
  content-visibility: hidden;
}
</style>

<div>Test passes if the word “PASS” and a green box can been seen below.</div>
<iframe id="frame" class=hidden width=400 height=200 srcdoc='
  <style>
  div {
    background: green;
  }
  </style>
  <div>PASS</div>
'></iframe>
<div>Lorem ipsum consectetur adipiscing elit</div>

<script>
async function runTest() {
  document.getElementById("frame").classList.remove("hidden");
  requestAnimationFrame(takeScreenshot);
}

window.onload = () => {
  requestAnimationFrame(() => {
    requestAnimationFrame(runTest);
  });
};
</script>
</html>