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Test Info:

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Overflow Test: focused ::scroll-button() does not crash after becoming display none</title>
<link rel="help" href="http://crbug.com/402673873">
<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>
<style>
#scroller::scroll-button(left) {
content: "";
background-color: red;
height: 100px;
width: 100px;
top: 0;
left: 0;
position: absolute;
}
#scroller.hide::scroll-button(left) {
display: none;
}
#scroller {
width: 300px;
height: 300px;
overflow: auto;
}
#filler {
height: 20000x;
}
</style>
<div id="scroller">
<div id="filler"></div>
</div>
<script>
promise_test(async t => {
await new test_driver.Actions()
.pointerMove(15, 15)
.pointerDown()
.pointerUp()
.send();
scroller.className = "hide";
document.documentElement.offsetTop;
await new test_driver.Actions()
.pointerMove(15, 15)
.pointerDown()
.pointerUp()
.send();
assert_true(true);
});
</script>