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<!DOCTYPE HTML>
<meta charset=utf-8>
<title>Element Timing: do NOT observe elements from same-origin iframes</title>
<body>
<style>
body {
margin: 0;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/element-timing-helpers.js"></script>
<script>
async_test((t) => {
assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");
const observer = new PerformanceObserver(
t.step_func_done((entryList) => {
assert_unreached("Should not have received an entry!");
})
);
observer.observe({entryTypes: ['element']});
// We add the iframe during onload to be sure that the observer is registered
// in time for it to observe the element timing.
// TODO(npm): change observer to use buffered flag.
window.onload = () => {
// Add iframe with an image of width and height equal to 100.
const iframe = document.createElement('iframe');
iframe.src = 'resources/iframe-with-square.html';
iframe.onload = () => {
// After a short delay, assume that the entry was not dispatched to the
// parent frame.
t.step_timeout(() => {
t.done();
}, 100);
}
document.body.appendChild(iframe);
};
}, 'Element in child iframe is not observed, even if same-origin.');
</script>
</body>
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