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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/with-first-paint/first-paint-only.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<head>
<title>Performance Paint Timing Test: FP only</title>
</head>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="main"></div>
<script>
setup({"hide_test_state": true});
async_test(function (t) {
assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");
const div = document.createElement("div");
div.style.width = "100px";
div.style.height = "100px";
div.style.backgroundColor = "red";
div.style.color = "blue";
document.getElementById("main").appendChild(div);
function testPaintEntries() {
const bufferedEntries = performance.getEntriesByType('paint');
if (bufferedEntries.length < 1) {
t.step_timeout(function() {
testPaintEntries();
}, 20);
return;
}
t.step(function() {
assert_equals(bufferedEntries.length, 1, "FP only.");
assert_equals(bufferedEntries[0].entryType, "paint");
assert_equals(bufferedEntries[0].name, "first-paint");
t.done();
});
}
t.step(function() {
testPaintEntries();
})
}, "Performance first paint timing entry exists. No first contentful paint.");
</script>
</body>
</html>