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74 lines
2.7 KiB
HTML
74 lines
2.7 KiB
HTML
<!DOCTYPE html>
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<head>
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<title>Performance Paint Timing Test: FP followed by FCP</title>
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</head>
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<body>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<div id="main"></div>
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<div id="image"></div>
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<script>
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async_test(function (t) {
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const bufferedEntries = performance.getEntriesByType('paint');
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assert_equals(bufferedEntries.length, 0, "No paint entries yet");
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const div = document.createElement("div");
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div.style.width = "100px";
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div.style.height = "100px";
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div.style.backgroundColor = "red";
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div.style.color = "blue";
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document.getElementById("main").appendChild(div);
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function testPaintEntries() {
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const bufferedEntries = performance.getEntriesByType('paint');
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if (bufferedEntries.length < 1) {
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t.step_timeout(function() {
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testPaintEntries();
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}, 20);
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return;
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}
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t.step(function() {
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assert_equals(bufferedEntries.length, 1, "FP only.");
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assert_equals(bufferedEntries[0].entryType, "paint");
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assert_equals(bufferedEntries[0].name, "first-paint");
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});
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const img = document.createElement("IMG");
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img.src = "resources/circles.png";
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img.onload = function() {
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function secondTestPaintEntries() {
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const moreBufferedEntries = performance.getEntriesByType('paint');
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if (moreBufferedEntries.length < 2) {
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t.step_timeout(function() {
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secondTestPaintEntries();
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}, 20);
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return;
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}
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t.step(function() {
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assert_equals(moreBufferedEntries.length, 2, "FP and FCP.");
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assert_equals(moreBufferedEntries[0].entryType, "paint");
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assert_equals(moreBufferedEntries[0].name, "first-paint");
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const fpEntriesGotByName =
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performance.getEntriesByName('first-paint');
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assert_equals(fpEntriesGotByName.length, 1);
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assert_equals(moreBufferedEntries[0], fpEntriesGotByName[0]);
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assert_equals(moreBufferedEntries[1].entryType, "paint");
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assert_equals(moreBufferedEntries[1].name, "first-contentful-paint");
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const fcpEntriesGotByName =
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performance.getEntriesByName('first-contentful-paint');
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assert_equals(fcpEntriesGotByName.length, 1);
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assert_equals(moreBufferedEntries[1], fcpEntriesGotByName[0]);
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t.done();
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});
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}
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t.step(function() {
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secondTestPaintEntries();
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});
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};
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document.getElementById('image').appendChild(img);
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}
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t.step(function() {
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testPaintEntries();
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});
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}, "First Paint triggered by non-contentful paint. Image load triggers First Contentful Paint.");
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</script>
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</body>
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</html>
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