copy-document-mode-quirks.https.html (707B)
1 <title>Test document picture-in-picture copies Document mode when it's quirks mode</title> 2 <script src="/resources/testharness.js"></script> 3 <script src="/resources/testharnessreport.js"></script> 4 <script src="/resources/testdriver.js"></script> 5 <script src="/resources/testdriver-vendor.js"></script> 6 <body> 7 <script> 8 promise_test(async (t) => { 9 assert_equals(document.compatMode, "BackCompat", "The opener document should be on quirks mode"); 10 await test_driver.bless('request PiP window'); 11 const pipWindow = await documentPictureInPicture.requestWindow(); 12 assert_equals(pipWindow.document.compatMode, "BackCompat", "The picture-in-picture document should be on quirks mode"); 13 }); 14 </script> 15 </body>