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<!doctype html>
<meta charset=utf-8>
<title>Should not scroll out of rounded corner</title>
<link rel="help" href="https://crbug.com/40277896">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/dom/events/scrolling/scroll_support.js"></script>
<style>
#scroller {
border-radius: 100px;
overflow: auto;
width: 300px;
height: 300px;
border: 2px solid blue;
will-change: scroll-position;
}
.spacer {
height: 200vh;
}
</style>
<div id="scroller">
<div class="spacer"></div>
</div>
<div class="spacer"></div>
<script>
promise_test(async (t) => {
await waitForCompositorCommit();
let scrolled = new Promise((resolve) => {
let scrollers = [window, document.getElementById("scroller")];
let onscroll = (evt) => {
for (const scroller of scrollers) {
scroller.removeEventListener("scroll", onscroll);
}
resolve(evt.target.id || "root");
}
for (const scroller of scrollers) {
scroller.addEventListener("scroll", onscroll);
}
});
const actions = new test_driver.Actions().scroll(20, 20, 0, 50, { duration: 50 });
actions.send();
assert_equals(await scrolled, "root", "Incorrect element scrolled");
}, "Wheel-scroll out of rounded corner skips that scroller");
</script>
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