<!DOCTYPE html>
<html>
<title>View transitions: computed style on pseudo-element stays in sync with the DOM element</title>
<link rel="help" href="https://www.w3.org/TR/css-view-transitions-1/">
<link rel="author" href="mailto:khushalsagar@chromium.org">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<style>
div {
  width: 100px;
  height: 100px;
  background: blue;
  view-transition-name: target;
  contain: paint;
}
</style>

<div id=first></div>

<script>
promise_test(async t => {
  assert_implements(document.startViewTransition, "Missing document.startViewTransition");
  return new Promise(async (resolve, reject) => {
    let transition = document.startViewTransition();
    await transition.updateCallbackDone;
    await transition.ready;

    let viewbox = window.getComputedStyle(
      document.documentElement, "::view-transition-new(target)").objectViewBox;
    assert_equals(viewbox, "none", "incorrect viewbox " + viewbox);

    first.style.filter = "blur(5px)";
    viewbox = window.getComputedStyle(
      document.documentElement, "::view-transition-new(target)").objectViewBox;
    assert_equals(viewbox, "none", "incorrect viewbox " + viewbox);

    transition.finished.then(resolve, reject);
  });
}, "computed style on pseudo-element stays in sync with the DOM element");
</script>
