/DOM Events


This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The voiceschanged event of the Web Speech API is fired when the list of SpeechSynthesisVoice objects that would be returned by the SpeechSynthesis.getVoices() method has changed (when the voiceschanged event fires.)

Bubbles No
Cancelable No
Target objects SpeechSynthesis
Interface Event


This could be used to repopulate a list of voices that the user can choose between when the event fires:

var synth = window.speechSynthesis;


synth.onvoicechanged = function() {
  var voices = synth.getVoices();

  for(i = 0; i < voices.length ; i++) {
    var option = document.createElement('option');
    option.textContent = voices[i].name + ' (' + voices[i].lang + ')';
    option.setAttribute('data-lang', voices[i].lang);
    option.setAttribute('data-name', voices[i].name);


The voicechanged event implements the Event interface — it has available the properties and methods defined on this interface.


Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 33 (Yes) 48 (48) [1] No support No support No support
Feature Android Chrome Edge Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) ? 2.5 No support No support No support
  • [1] Can be enabled via the media.webspeech.synth.enabled flag in about:config.

See also

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