Basic requestIdleCallback Tests PASS window.requestIdleCallback is defined PASS window.cancelIdleCallback is defined PASS window.requestIdleCallback() returns a number PASS window.cancelIdleCallback() returns undefined FAIL requestIdleCallback schedules callbacks assert_true: IdleDeadline.timeRemaining() MUST be less than or equal to 50ms in the future. expected true got false PASS cancelIdleCallback cancels callbacks