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Test Info: Warnings

<!DOCTYPE html>
<meta name="viewport" content="width=device-width,initial-scale=1">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#scene {
transform: translateX(0px);
transform-style: preserve-3d;
}
#target {
position: absolute;
left: 100px;
top: 100px;
width: 200px;
height: 40px;
background: red;
}
#scroller {
position: absolute;
left: 50px;
top: 10px;
width: 155px;
height: 115px;
overflow: auto;
resize: both;
transform: translateZ(-1px);
background: blue;
}
#overlay {
position: absolute;
left: 100px;
top: 100px;
width: 200px;
height: 40px;
transform: translateZ(1px);
background: purple;
}
</style>
<div id="scene">
<div id="target"></div>
<div id="scroller"></div>
<div id="overlay"></div>
</div>
<script>
setup({ single_test: true });
const target = document.getElementById("target");
new IntersectionObserver(entries => {
assert_false(entries[0].isVisible);
done();
}, {trackVisibility: true, delay: 100}).observe(target);
</script>