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<!DOCTYPE HTML>
<meta charset=utf-8>
<title>IntersectionObserver: callback arguments</title>
<link rel="help" href="https://w3c.github.io/IntersectionObserver/#notify-intersection-observers-algo">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
"use strict";
async_test(t => {
const io = new IntersectionObserver(function(entries, observer) {
t.step(() => {
assert_equals(this, io);
assert_equals(arguments.length, 2);
assert_true(Array.isArray(entries));
assert_equals(entries.length, 1);
assert_true(entries[0] instanceof IntersectionObserverEntry);
assert_equals(observer, io);
io.disconnect();
t.done();
});
});
io.observe(document.body);
}, "Callback is invoked with |this| value of IntersectionObserver and two arguments");
</script>
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