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<!DOCTYPE HTML>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, minimum-scale=1.0">
<title>A simple test checks "overscrolled" info in APZTestData</title>
<title>Tests scroll anchoring updates in-progress wheel scrolling __relatively__</title>
<script src="apz_test_utils.js"></script>
<script src="apz_test_native_event_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<div style="height: 300vh; background-color: blue;"></div><!-- Make the root scrollable -->
<script>
async function test() {
// Try to overscroll by using setAsyncScrollOffset to avoid race conditions
// that APZTestData haven't been arrived on the main-thread.
SpecialPowers.DOMWindowUtils.setAsyncScrollOffset(document.scrollingElement, 0, -100);
const scrollId =
SpecialPowers.DOMWindowUtils.getViewId(document.scrollingElement);
const data = SpecialPowers.DOMWindowUtils.getCompositorAPZTestData();
for (apzcData of data.additionalData) {
if (apzcData.key == scrollId) {
ok(apzcData.value.split(",").includes("overscrolled"));
}
}
}
waitUntilApzStable()
.then(test)
.then(subtestDone, subtestFailed);
</script>
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