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+<!doctype HTML>
+<html class="reftest-wait">
+<meta charset="utf8">
+<title>Content Visibility: hidden subtree becomes auto in the viewport</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="container-with-child-ref.html">
+<meta name="assert" content="hidden subtree becomes auto and then paints">
+<script src="/common/reftest-wait.js"></script>
+
+<style>
+#container {
+ width: 150px;
+ height: 150px;
+ background: lightblue;
+}
+#child {
+ width: 50px;
+ height: 50px;
+ background: green;
+}
+.auto { content-visibility: auto; }
+.hidden { content-visibility: hidden; }
+
+</style>
+
+<div id=container class=hidden>
+ Test passes if you can see this text and a green box.
+ <div id=child></div>
+</div>
+
+<script>
+
+function runTest() {
+ document.getElementById("container").classList.remove("hidden");
+ document.getElementById("container").classList.add("auto");
+
+ requestAnimationFrame(takeScreenshot);
+}
+
+window.onload = requestAnimationFrame(() => {
+ requestAnimationFrame(() => {
+ requestAnimationFrame(() => {
+ runTest();
+ });
+ });
+});
+
+</script>
+</html>
+
+