pseudo-computed-style-stays-in-sync-with-new-element.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /css/css-view-transitions/pseudo-computed-style-stays-in-sync-with-new-element.html - WPT Dashboard Interop Dashboard

<!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>