If W3 themself do not fucking can get a simple loopback to work how is one expected to be able to program to this API????

Can anyone get this to work, i mean it is an example it should work?
Well it give error on "entries" so i thought it may be a function? I added paragraphs and it pass, listening to nothing, loopback nothing.

I just need a working example of howto listen to a port and loopback "send" it. I really need help, i been programming using windows XP where examples i find on web still works, i guess the code been updated and replaced.

http://webaudio.github.io/web-midi-api/

4.10.6 A Simple Loopback
This example loops all input messages on the first input port to the first output port - including system exclusive messages.

********NO THE FUCK IT DOES NOT*************

EXAMPLE 8
var midi = null; // global MIDIAccess object
var output = null;

function echoMIDIMessage( event ) {
if (output) {
output.send( event.data, event.timestamp );
}
}

function onMIDISuccess( midiAccess ) {
console.log( "MIDI ready!" );
var input = midiAccess.inputs.entries.next();
if (input)
input.onmidimessage = echoMIDIMessage;
output = midiAccess.outputs.values().next().value;
if (!input || !output)
console.log("Uh oh! Couldn't get i/o ports.");
}

function onMIDIFailure(msg) {
console.log( "Failed to get MIDI access - " + msg );
}

navigator.requestMIDIAccess().then( onMIDISuccess, onMIDIFailure );

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