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<!DOCTYPE html>
<meta name="viewport" content="width=device-width">
<title>Resnap to empty sized element</title>
<link rel="help" href="https://drafts.csswg.org/css-scroll-snap/#example-d0a2d86f"/>
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1914178">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#scroller {
height: 500px;
width: 500px;
overflow: scroll;
scroll-snap-type: y proximity;
}
#scroller::after {
display: block;
content: "";
scroll-snap-align: end;
}
li {
height: 100px;
}
</style>
<ul id="scroller">
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
<script>
test(t => {
const scroller = document.getElementById("scroller");
// Scroll to the last child in the scroll container.
document.querySelector("#scroller > :last-child").scrollIntoView();
const scrollTop = scroller.scrollTop;
assert_greater_than(scrollTop, 0);
// Append a new element into the scroll container.
const li = document.createElement("li");
scroller.appendChild(li);
// The ::after pseudo content should be the snap target, even if the size
// is empty.
assert_equals(scroller.scrollTop, scrollTop + 100);
}, "Resnap to empty sized element");
</script>
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