CONSOLE MESSAGE: line 20: TypeError: navigator.vibrate is not a function. (In 'navigator.vibrate(10000)', 'navigator.vibrate' is undefined) Tests the cancelVibration after changing the value of pageVisibility to hidden. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". FAIL internals.isVibrating() should be false. Threw exception TypeError: internals.isVibrating is not a function. (In 'internals.isVibrating()', 'internals.isVibrating' is undefined) FAIL successfullyParsed should be true (of type boolean). Was undefined (of type undefined). TEST COMPLETE