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<!DOCTYPE html>
<meta charset="utf-8">
<html class="reftest-wait">
<title>CSS Overflow: ::scroll-marker with ::scroll-marker-group on root element doesn't propagate scrolling</title>
<link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-marker-pseudo">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/dom/events/scrolling/scroll_support.js"></script>
<style>
body {
margin: 0;
}
#container {
overflow: auto;
height: 600px;
position: relative;
}
iframe {
width: 600px;
height: 400px;
position: absolute;
top: 500px;
border: 2px solid black;
}
</style>
<div id="container">
<iframe id="target" onload="run_test()" src="resources/root-scroll-marker-activation-iframe.html"></iframe>
</div>
<script>
function run_test() {
promise_test(async t => {
const iframe = document.getElementById("target");
const container = document.getElementById("container");
const target = iframe.contentWindow;
const scrollEndPromise = waitForScrollEndFallbackToDelayWithoutScrollEvent(target);
await new test_driver.Actions()
.pointerMove(140, 510)
.pointerDown()
.pointerUp()
.send();
await scrollEndPromise;
assert_equals(container.scrollTop, 0, "scrolling is not propagated from iframe to the main frame");
assert_greater_than(target.scrollY, 0, "scroll marker activation scrolls iframe");
document.documentElement.classList.remove("reftest-wait");
});
}
</script>
</html>
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