Exercising the Beacon API On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS Object.getPrototypeOf(navigator).hasOwnProperty('sendBeacon') is true PASS typeof navigator.sendBeacon is "function" PASS navigator.sendBeacon() threw exception TypeError: Failed to execute 'sendBeacon' on 'Navigator': 1 argument required, but only 0 present.. PASS navigator.sendBeacon('http:') threw exception TypeError: Failed to execute 'sendBeacon' on 'Navigator': The URL argument is ill-formed or unsupported.. PASS navigator.sendBeacon('javascript:alert(1);') threw exception TypeError: Failed to execute 'sendBeacon' on 'Navigator': Beacons are only supported over HTTP(S).. PASS navigator.sendBeacon('https:', new Uint8Array(new SharedArrayBuffer(10))) threw exception TypeError: Failed to execute 'sendBeacon' on 'Navigator': The provided ArrayBufferView value must not be shared.. PASS successfullyParsed is true TEST COMPLETE