This tests the constructor for the MIDIConnectionEvent DOM class. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS new MIDIConnectionEvent('eventType').bubbles is false PASS new MIDIConnectionEvent('eventType').cancelable is false PASS new MIDIConnectionEvent('eventType').port is null PASS new MIDIConnectionEvent('eventType', { bubbles: false }).bubbles is false PASS new MIDIConnectionEvent('eventType', { bubbles: true }).bubbles is true PASS new MIDIConnectionEvent('eventType', { cancelable: false }).cancelable is false PASS new MIDIConnectionEvent('eventType', { cancelable: true }).cancelable is true PASS new MIDIConnectionEvent('eventType', { bubbles: true, cancelable: true }).bubbles is true PASS new MIDIConnectionEvent('eventType', { bubbles: true, cancelable: true }).cancelable is true PASS successfullyParsed is true TEST COMPLETE