mecab

window.addEventListener('message', function(e) {
  const data = e.data || {};
  if (data.type !== 'item')
    return;
  const message = data.message || {};
  const obj = { detail: { command: message.command, body: message.body, from: message.from }};
  
  const synth = window.speechSynthesis;
  if (obj.detail.command === 'PRIVMSG') {
    var utter = new SpeechSynthesisUtterance(obj.detail.body);