Text to spech example usin api from javaScript (speaknowjs)

main.js

const synth = window.speechSynthesis;
const readText = (
  text = "FELICIDADES"
) => {
  voices = synth.getVoices();
  event.preventDefault();
  let utterThis = new SpeechSynthesisUtterance(text);
  var selectedOption = "Google español de Estados Unidos";
  for (i = 0; i < voices.length; i++) {
    if (voices[i].name === selectedOption) {
      utterThis.voice = voices[i];
    }
  }
  synth.speak(utterThis);
};