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<!DOCTYPE HTML>
<meta charset=utf-8>
<title>Element Timing: check intersectionRect for element in iframe</title>
<body>
<style>
body {
margin: 50px;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
async_test((t) => {
assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");
on_event(window, 'message', e => {
assert_equals(e.data.length, 1);
assert_equals(e.data.entryType, 'element');
const rect = e.data.rect;
// rect should start at (0,0) even though main frame has a margin.
assert_equals(rect.left, 0);
assert_equals(rect.right, 100);
assert_equals(rect.top, 0);
assert_equals(rect.bottom, 100);
assert_equals(e.data.naturalWidth, 100);
assert_equals(e.data.naturalHeight, 100);
assert_equals(e.data.id, 'iframe_img_id');
assert_equals(e.data.elementId, 'iframe_img_id');
t.done();
});
}, 'Element Timing entry in iframe has coordinates relative to the iframe.');
</script>
<iframe src="resources/iframe-with-square-sends-entry.html"/>
</body>
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