RunKit + 
Try any Node.js package right in your browser
This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including web-midi-test. Try it out:
const WMT = require('web-midi-test');
const navigator = { requestMIDIAccess: WMT.requestMIDIAccess };
const source = new WMT.MidiSrc('VIRTUAL MIDI-In');
source.connect();
const list = [
[144, 60, 127], [128, 60, 0], [144, 64, 127], [128, 64, 0]
];
function nextMidi() {
source.emit(list.shift());
if (list.length) setTimeout(nextMidi, 1000);
}
function onFail() { console.error('Oops...'); }
function onSuccess(midiAccess) {
midiAccess.inputs.forEach(function(port) {
console.log(port.name + ' is open!');
port.onmidimessage = function(msg) {
console.log(port.name + ': ' + msg.data);
};
});
setTimeout(nextMidi, 1000);
}
navigator.requestMIDIAccess().then(onSuccess, onFail);
- all documents on RunKit are public
require()any package directly from npm- use arrow functions, classes, template strings, and most of ES6
awaitany promise instead of using callbacks (example)- create your own embedded node.js snippets
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