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<!doctype html>
<meta name="viewport" content="width=device-width,initial-scale=1">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="help" href="https://github.com/w3c/IntersectionObserver/issues/457">
<style>
div {
width: 100px;
height: 100px;
background: blue;
margin: 10px
}
</style>
<div id="root"></div>
<script>
let t = async_test("IntersectionObserver reports a (non-intersecting) entry if different-document from the doc");
let doc = document.implementation.createHTMLDocument("");
let target = doc.createElement("div");
doc.body.appendChild(target);
new IntersectionObserver(
t.step_func_done(function(records) {
assert_equals(records.length, 1);
assert_false(records[0].isIntersecting);
}),
{ root: document.querySelector("#root") }
).observe(target);
</script>
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