cancel-invoked.html (1037B)
1 <!doctype html> 2 <meta charset=utf-8> 3 <title>cancelling idle requests</title> 4 <script src=/resources/testharness.js></script> 5 <script src=/resources/testharnessreport.js></script> 6 <div id="log"></div> 7 <script> 8 test(function (t) { 9 window.cancelIdleCallback(42); 10 assert_true(true); 11 }, "cancelIdleCallback does nothing if there is no callback with the given handle"); 12 13 async_test(function (t) { 14 assert_false(document.hidden, "document.hidden must exist and be false to run this test properly"); 15 var neverCalled = true; 16 var handle = window.requestIdleCallback(function () { 17 neverCalled = false; 18 }); 19 window.cancelIdleCallback(handle); 20 21 t.step_timeout(function() { 22 assert_true(neverCalled); 23 t.done(); 24 }, 2000); 25 }, "A cancelled callback is never invoked"); 26 27 async_test(function (t) { 28 var handle = requestIdleCallback(t.step_func_done(function () { 29 cancelIdleCallback(handle); 30 })); 31 }, "Cancelling the currently executing idle callback should be allowed"); 32 </script>