<!DOCTYPE html> <head> <title>Performance Paint Timing Test: FCP due to image</title> </head> <body> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <div id="image"></div> <script> setup({"hide_test_state": true}); async_test(function (t) { assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported."); const img = document.createElement("IMG"); img.src = "../resources/circles.png"; img.onload = function() { function testPaintEntries() { const bufferedEntries = performance.getEntriesByType('paint'); if (bufferedEntries.length < 2) { t.step_timeout(function() { testPaintEntries(); }, 20); return; } t.step(function() { assert_equals(bufferedEntries.length, 2, "There should be two paint timing instances."); assert_equals(bufferedEntries[0].entryType, "paint"); assert_equals(bufferedEntries[0].name, "first-paint"); assert_equals(bufferedEntries[1].entryType, "paint"); assert_equals(bufferedEntries[1].name, "first-contentful-paint"); t.done(); }) } t.step(function() { testPaintEntries(); }); }; document.getElementById('image').appendChild(img); }, "First contentful paint fires due to image render."); </script> </body> </html>