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<!DOCTYPE HTML>
<meta charset=utf-8>
<title>Element Timing: image with scaling.</title>
<head>
<style>
/* The margin of 50px allows the rect to be fully shown when the div is scaled. */
body {
margin: 50px;
}
.my_div {
width: 100px;
height: 50px;
transform: scale(2);
}
</style>
</head>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/element-timing-helpers.js"></script>
<script>
const beforeRender = performance.now();
async_test(function (t) {
assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");
const observer = new PerformanceObserver(
t.step_func_done(function(entryList) {
assert_equals(entryList.getEntries().length, 1);
const entry = entryList.getEntries()[0];
const pathname = window.location.origin + '/images/black-rectangle.png';
checkElement(entry, pathname, 'rectangle', 'rect_id', beforeRender,
document.getElementById('rect_id'));
checkRect(entry, [0, 200, 25, 125]);
checkNaturalSize(entry, 100, 50);
})
);
observer.observe({entryTypes: ['element']});
}, 'Image intersectionRect is affected by scaling, but not its intrinsic size.');
</script>
<div class="my_div" id='div_id'>
<img src="/images/black-rectangle.png" elementtiming="rectangle" id='rect_id'/>
</div>
</body>
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