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<!DOCTYPE HTML>
<meta charset=utf-8>
<title>Element Timing: observe element with background image</title>
<body>
<style>
body {
margin: 0;
}
#target {
width: 100px;
height: 50px;
background-image: url('/images/black-rectangle.png');
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/element-timing-helpers.js"></script>
<script>
let 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, 'my_div', 'target', beforeRender,
document.getElementById('target'));
checkRect(entry, [0, 100, 0, 50]);
checkNaturalSize(entry, 100, 50);
})
);
observer.observe({entryTypes: ['element']});
}, 'Element with elementtiming attribute and background image is observable.');
</script>
<div id='target' elementtiming='my_div'></div>
</body>
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