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diff --git a/testing/web-platform/tests/css/css-view-transitions/offscreen-element-modified-before-coming-onscreen.html b/testing/web-platform/tests/css/css-view-transitions/offscreen-element-modified-before-coming-onscreen.html
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+++ b/testing/web-platform/tests/css/css-view-transitions/offscreen-element-modified-before-coming-onscreen.html
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+<!DOCTYPE html>
+<html class=reftest-wait>
+<title>View transitions: new element is modified while offscren and brought onscreen using pseudo</title>
+<link rel="help" href="https://github.com/WICG/view-transitions">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<link rel="match" href="offscreen-element-modified-before-coming-onscreen-ref.html">
+
+<script src="/common/reftest-wait.js"></script>
+<style>
+#target {
+ width: 100px;
+ height: 100px;
+ view-transition-name: target;
+ position: fixed;
+ background: green;
+ left: 0;
+ top: 200vh;
+}
+
+.hidden {
+ width: 10px;
+ height: 10px;
+ background: grey;
+ view-transition-name: hidden;
+}
+
+.onscreen::view-transition-group(target) {
+ transform: unset;
+ position: fixed;
+ top: 0;
+ left: 0;
+ animation: unset;
+}
+
+html::view-transition-group(hidden) { animation-duration: 300s; }
+html::view-transition-image-pair(hidden) { animation: unset; opacity: 0; }
+
+html::view-transition-old(target) { animation: unset; opacity: 0; }
+html::view-transition-new(target) { animation: unset; opacity: 1; }
+
+</style>
+
+<div id=target class=target>
+<div id=hidden class=hidden></div>
+
+<script>
+failIfNot(document.startViewTransition, "Missing document.startViewTransition");
+
+function bringOnscreenAndScreenshot() {
+ document.documentElement.classList.add("onscreen");
+
+ requestAnimationFrame(() => requestAnimationFrame(() =>
+ requestAnimationFrame(() => requestAnimationFrame(takeScreenshot))
+ ));
+}
+
+async function runTest() {
+ // Start the transition while the element is offscreen.
+ let transition = document.startViewTransition();
+ await transition.ready;
+
+ // Change the element's color while its still offscreen.
+ target.style.background = "blue";
+
+ // Bring the element onscreen and ensure the color change is presented.
+ requestAnimationFrame(() => requestAnimationFrame(() =>
+ requestAnimationFrame(() => requestAnimationFrame(
+ bringOnscreenAndScreenshot))
+ ));
+}
+onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
+</script>
+