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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /paint-timing/first-paint-only/child-painting-first-image.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/utils.js"></script>
<script>
setup({"hide_test_state": true});
const entriesExpectToReceive = [
{
'entryType': 'paint',
'name': 'first-paint'
},
{
'entryType': 'paint',
'name': 'first-contentful-paint'
}
];
promise_test(async t => {
assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");
const childDone = new Promise(resolve => {
window.addEventListener('message', e => {
for (let i = 0; i < entriesExpectToReceive.length; i++) {
if (entriesExpectToReceive[i].entryType == e.data.entryType &&
entriesExpectToReceive[i].name == e.data.name) {
entriesExpectToReceive.splice(i, 1);
break;
}
}
if (entriesExpectToReceive.length == 0) {
resolve();
}
});
});
const iframe = document.createElement('iframe');
iframe.id = 'child-iframe';
iframe.src = '../resources/subframe-painting.html';
document.body.appendChild(iframe);
// When only child frame paints, expect only first-paint.
await childDone;
await assertFirstPaint();
await assertNoFirstContentfulPaint(t);
}, 'Parent frame ignores paint-timing events fired from child image rendering.');
</script>
</body>