print-during-beforeunload.html (863B)
1 <!DOCTYPE html> 2 <meta charset="utf-8"> 3 <title>print() during beforeunload</title> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 7 <body> 8 <script> 9 "use strict"; 10 11 async_test(t => { 12 const w = window.open("resources/print-during-event.sub.html?event=beforeunload"); 13 t.add_cleanup(() => w.close()); 14 15 const messages = []; 16 window.addEventListener("message", t.step_func(({ data }) => { 17 messages.push(data); 18 19 if (messages.length === 1) { 20 assert_array_equals(messages, ["start"]); 21 w.location.href = "resources/destination.html"; 22 } else if (messages.length === 2) { 23 // The test passes if we've reached this point because the print() dialog did not block the navigation. 24 assert_array_equals(messages, ["start", "destination"]); 25 t.done(); 26 } 27 })); 28 }); 29 </script>