opt-in-removed-during-transition.html

<!DOCTYPE html>
<html class="reftest-wait">
<title>View Transitions: @view-transition removing opt-in doesn't skip active transition</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/">
<link rel="author" href="mailto:[email protected]">
<link rel="match" href="opt-in-removed-during-transition-ref.html">
<script src="/common/reftest-wait.js"></script>
<style>
  @view-transition {
    navigation: auto;
  }
  :root {
    view-transition-name: none;
  }
  ::view-transition {
    background-color: pink;
  }
  ::view-transition-new(target) {
    animation: none;
    opacity: 0;
  }
  ::view-transition-old(target) {
    animation: none;
    opacity: 1;
  }
  ::view-transition-group(target) {
    animation-play-state: paused;
  }
  #target {
    background-color: limegreen;
    width: 100px;
    height: 100px;
    view-transition-name: target;
  }
  #target.transitioned {
    background-color: red;
  }
</style>
<script>
const params = new URLSearchParams(location.search.substr(1));
const is_starting_page = !params.has('new');

if (is_starting_page) {
  requestAnimationFrame(() => requestAnimationFrame( () => {
    location.replace(location.href + '?new');
  }));
} else {
  addEventListener('pagereveal', async e => {
    document.getElementById('target').classList.add('transitioned');
    await e.viewTransition.ready;
    await new Promise(resolve => requestAnimationFrame(resolve));

    // Remove the opt-in after the view transition has started.
    document.styleSheets[0].cssRules[0].navigation = 'none';

    requestAnimationFrame(() => requestAnimationFrame(takeScreenshot));
  });
}
</script>
<div id="target"></div>
</html>
chromium/third_party/blink/web_tests/external/wpt/css/css-view-transitions/navigation/opt-in-removed-during-transition.html
