| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Support page for beforeunload-canceling.html</title> |
| |
| <h1>If this goes away, it navigated</h1> |
| |
| <script> |
| "use strict"; |
| |
| window.runTest = (t, { valueToReturn, expectCancelation, setReturnValue, expectedReturnValue }) => { |
| window.onbeforeunload = t.step_func(e => { |
| if (setReturnValue !== undefined) { |
| e.returnValue = setReturnValue; |
| } |
| |
| return valueToReturn; |
| }); |
| |
| const listener = t.step_func(e => { |
| top.assert_equals(e.defaultPrevented, expectCancelation, "canceled"); |
| top.assert_equals(e.returnValue, expectedReturnValue, "returnValue"); |
| window.onbeforeunload = null; |
| |
| t.done(); |
| }); |
| |
| window.addEventListener("beforeunload", listener); |
| |
| window.location.href = "about:blank"; |
| }; |
| </script> |
