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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Overflow: ::scroll-button on root element activation</title>
<link rel="help" href="https://drafts.csswg.org/css-overflow-5/#scroll-buttons">
<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="/web-animations/testcommon.js"></script>
<script src="/dom/events/scrolling/scroll_support.js"></script>
<style>
body {
margin: 0;
}
:root::scroll-button(block-end) {
content: "down";
position: absolute;
top: 0;
width: 30px;
height: 30px;;
}
div {
width: 600px;
height: 300px;
margin-bottom: 20px;
background: green;
}
</style>
<div></div>
<div></div>
<div></div>
<script>
promise_test(async t => {
let scrollEndPromise = waitForScrollEndFallbackToDelayWithoutScrollEvent(window);
await new test_driver.Actions()
.pointerMove(10, 10)
.pointerDown()
.pointerUp()
.send();
await scrollEndPromise;
await waitForAnimationFrames(2);
assert_not_equals(window.scrollY, 0);
});
</script>
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