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| 1 <!DOCTYPE html> |
| 2 <meta charset="utf-8"> |
| 3 <title>beforeunload return value cancelation behavior</title> |
| 4 <link rel="help" href="https://html.spec.whatwg.org/multipage/webappapis.html#th
e-event-handler-processing-algorithm"> |
| 5 <link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me"> |
| 6 <script src="/resources/testharness.js"></script> |
| 7 <script src="/resources/testharnessreport.js"></script> |
| 8 |
| 9 <div id="log"></div> |
| 10 |
| 11 <script> |
| 12 "use strict"; |
| 13 |
| 14 async_test(t => { |
| 15 let onbeforeunloadHappened = false; |
| 16 window.onbeforeunload = t.step_func(() => { |
| 17 onbeforeunloadHappened = true; |
| 18 return "cancel me"; |
| 19 }); |
| 20 |
| 21 const listener = t.step_func(e => { |
| 22 assert_true(onbeforeunloadHappened, "CustomEvent must be able to trigger the
event handler"); |
| 23 assert_false(e.defaultPrevented, "The event must not have been canceled"); |
| 24 window.onbeforeunload = null; |
| 25 t.done(); |
| 26 }); |
| 27 |
| 28 window.addEventListener("beforeunload", listener); |
| 29 |
| 30 window.dispatchEvent(new CustomEvent("beforeunload")); |
| 31 }, "Returning a string must not cancel the event: CustomEvent, non-cancelable"); |
| 32 |
| 33 async_test(t => { |
| 34 let onbeforeunloadHappened = false; |
| 35 window.onbeforeunload = t.step_func(() => { |
| 36 onbeforeunloadHappened = true; |
| 37 return "cancel me"; |
| 38 }); |
| 39 |
| 40 const listener = t.step_func(e => { |
| 41 assert_true(onbeforeunloadHappened, "CustomEvent must be able to trigger the
event handler"); |
| 42 assert_false(e.defaultPrevented, "The event must not have been canceled"); |
| 43 window.onbeforeunload = null; |
| 44 t.done(); |
| 45 }); |
| 46 |
| 47 window.addEventListener("beforeunload", listener); |
| 48 |
| 49 window.dispatchEvent(new CustomEvent("beforeunload", { cancelable: true })); |
| 50 }, "Returning a string must not cancel the event: CustomEvent, cancelable"); |
| 51 |
| 52 const testCases = [ |
| 53 { |
| 54 valueToReturn: null, |
| 55 expectCancelation: false, |
| 56 expectedReturnValue: "" |
| 57 }, |
| 58 { |
| 59 valueToReturn: undefined, |
| 60 expectCancelation: false, |
| 61 expectedReturnValue: "" |
| 62 }, |
| 63 { |
| 64 valueToReturn: "", |
| 65 expectCancelation: true, |
| 66 expectedReturnValue: "" |
| 67 }, |
| 68 { |
| 69 valueToReturn: false, |
| 70 expectCancelation: true, |
| 71 expectedReturnValue: "false" |
| 72 }, |
| 73 { |
| 74 valueToReturn: true, |
| 75 expectCancelation: true, |
| 76 expectedReturnValue: "true" |
| 77 }, |
| 78 { |
| 79 valueToReturn: 0, |
| 80 expectCancelation: true, |
| 81 expectedReturnValue: "0" |
| 82 }, |
| 83 { |
| 84 valueToReturn: null, |
| 85 expectCancelation: false, |
| 86 setReturnValue: "foo", |
| 87 expectedReturnValue: "foo" |
| 88 }, |
| 89 { |
| 90 valueToReturn: undefined, |
| 91 expectCancelation: false, |
| 92 setReturnValue: "foo", |
| 93 expectedReturnValue: "foo" |
| 94 }, |
| 95 { |
| 96 valueToReturn: "", |
| 97 expectCancelation: true, |
| 98 setReturnValue: "foo", |
| 99 expectedReturnValue: "foo" |
| 100 }, |
| 101 { |
| 102 valueToReturn: false, |
| 103 expectCancelation: true, |
| 104 setReturnValue: "foo", |
| 105 expectedReturnValue: "foo" |
| 106 }, |
| 107 { |
| 108 valueToReturn: true, |
| 109 expectCancelation: true, |
| 110 setReturnValue: "foo", |
| 111 expectedReturnValue: "foo" |
| 112 }, |
| 113 { |
| 114 valueToReturn: 0, |
| 115 expectCancelation: true, |
| 116 setReturnValue: "foo", |
| 117 expectedReturnValue: "foo" |
| 118 } |
| 119 ]; |
| 120 |
| 121 for (const testCase of testCases) { |
| 122 const labelAboutReturnValue = testCase.setReturnValue === undefined ? "" : |
| 123 `; setting returnValue to ${testCase.setReturnValue}`; |
| 124 |
| 125 async_test(t => { |
| 126 const iframe = document.createElement("iframe"); |
| 127 iframe.onload = t.step_func(() => { |
| 128 iframe.contentWindow.runTest(t, testCase); |
| 129 }); |
| 130 |
| 131 iframe.src = "beforeunload-canceling-1.html"; |
| 132 document.body.appendChild(iframe); |
| 133 }, `Returning ${testCase.valueToReturn} with a real iframe unloading${labelAbo
utReturnValue}`); |
| 134 } |
| 135 </script> |
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Chromium Code Reviews
Issue 2695813009:
Import wpt@503f5b5f78ec4e87d144f78609f363f0ed0ea8db (Closed)
