| <!DOCTYPE html> |
| <title>Document#onfullscreenerror</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <div id="log"></div> |
| <script> |
| async_test(function(t) |
| { |
| var sync = true; |
| var promise_executed = false; |
| assert_equals(document.onfullscreenerror, null, "initial onfullscreenerror"); |
| document.onfullscreenerror = t.step_func_done(function(event) { |
| assert_true(promise_executed); |
| assert_false(sync); |
| }); |
| var e = document.createElement('span'); |
| var promise = e.requestFullscreen(); |
| if (promise) { |
| promise.catch(()=> { |
| assert_false(sync); |
| promise_executed = true; |
| }); |
| } else { |
| // If promises aren't supported just treat it as already done. |
| promise_executed = true; |
| } |
| sync = false; |
| }); |
| </script> |
