| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Event.returnValue</title> |
| <link rel="author" title="Chris Rebert" href="http://chrisrebert.com"> |
| <link rel="help" href="https://dom.spec.whatwg.org/#dom-event-returnvalue"> |
| <meta name="flags" content="dom"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <div id="log"></div> |
| <script> |
| test(function() { |
| var ev = new Event("foo"); |
| assert_true(ev.returnValue, "returnValue"); |
| }, "When an event is created, returnValue should be initialized to true."); |
| test(function() { |
| var ev = new Event("foo", {"cancelable": false}); |
| assert_false(ev.cancelable, "cancelable (before)"); |
| ev.preventDefault(); |
| assert_false(ev.cancelable, "cancelable (after)"); |
| assert_true(ev.returnValue, "returnValue"); |
| }, "preventDefault() should not change returnValue if cancelable is false."); |
| test(function() { |
| var ev = new Event("foo", {"cancelable": false}); |
| assert_false(ev.cancelable, "cancelable (before)"); |
| ev.returnValue = false; |
| assert_false(ev.cancelable, "cancelable (after)"); |
| assert_true(ev.returnValue, "returnValue"); |
| }, "returnValue=false should have no effect if cancelable is false."); |
| test(function() { |
| var ev = new Event("foo", {"cancelable": true}); |
| assert_true(ev.cancelable, "cancelable (before)"); |
| ev.preventDefault(); |
| assert_true(ev.cancelable, "cancelable (after)"); |
| assert_false(ev.returnValue, "returnValue"); |
| }, "preventDefault() should change returnValue if cancelable is true."); |
| test(function() { |
| var ev = new Event("foo", {"cancelable": true}); |
| assert_true(ev.cancelable, "cancelable (before)"); |
| ev.returnValue = false; |
| assert_true(ev.cancelable, "cancelable (after)"); |
| assert_false(ev.returnValue, "returnValue"); |
| }, "returnValue should change returnValue if cancelable is true."); |
| test(function() { |
| var ev = document.createEvent("Event"); |
| ev.returnValue = false; |
| ev.initEvent("foo", true, true); |
| assert_true(ev.bubbles, "bubbles"); |
| assert_true(ev.cancelable, "cancelable"); |
| assert_true(ev.returnValue, "returnValue"); |
| }, "initEvent should unset returnValue."); |
| test(function() { |
| var ev = new Event("foo", {"cancelable": true}); |
| ev.preventDefault(); |
| ev.returnValue = true;// no-op |
| assert_true(ev.defaultPrevented); |
| assert_false(ev.returnValue); |
| }, "returnValue=true should have no effect once the canceled flag was set."); |
| </script> |
| </body> |
| </html> |
