<!DOCTYPE html> <head> <title> Performance Paint Timing Test: Not only the top level document, paints in the iframe should also generate the entry </title> </head> <body> <script src="../resources/utils.js"></script> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script> setup({"hide_test_state": true}); async_test(function (t) { assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported."); window.addEventListener('message', t.step_func(e => { if (e.data.entryType == "paint" && e.data.name == "first-contentful-paint") { t.done(); } })); const iframe = document.createElement('iframe'); iframe.src = '../resources/subframe-painting.html'; document.body.appendChild(iframe); }, 'Parent frame ignores paint-timing events fired from child image rendering.'); </script> </body> </html>