WebMidi.supported returns non boolean

[Steve Lee]

  get supported() {
    return (typeof navigator !== "undefined" && navigator.requestMIDIAccess);
  }

returns navigator.requestMIDIAccess

code should be something like

  get supported() {
    return (typeof navigator !== "undefined" && !!navigator.requestMIDIAccess);
  }

[Jean-Philippe Côté]

Thanks for reporting. Fixed in 8d42de2 (available in release 3.1.9).