blob: 36e3c7644a715486f027ac7d0dfb444d9b7ea5dd [file] [log] [blame]
<!DOCTYPE html>
<meta charset="utf8">
<title>CSS Scroll Anchoring: prioritize focused element</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-scroll-anchoring/#anchor-node-selection">
<meta name="assert" content="anchor selection prioritized focused element">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
body { height: 4000px }
.spacer { height: 100px }
#growing { height: 100px }
#focused { height: 10px }
</style>
<div class=spacer></div>
<div class=spacer></div>
<div class=spacer></div>
<div class=spacer></div>
<div id=growing></div>
<div class=spacer></div>
<div id=focused tabindex=0></div>
<div class=spacer></div>
<div class=spacer></div>
<script>
async_test((t) => {
document.scrollingElement.scrollTop = 150;
focused.focus();
const target_rect = focused.getBoundingClientRect();
growing.style.height = "3000px";
requestAnimationFrame(() => {
t.step(() => {
const new_rect = focused.getBoundingClientRect();
assert_equals(new_rect.x, target_rect.x, "x coordinate");
assert_equals(new_rect.y, target_rect.y, "y coordinate");
assert_not_equals(document.scrollingElement.scrollTop, 150, "scroll adjusted");
});
t.done();
});
}, "Anchor selection prioritized focused element.");
</script>