This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
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 |
Examples
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);
voiceSelect.appendChild(option);
}
}
Inheritance
The voicechanged event implements the Event interface — it has available the properties and methods defined on this interface.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Web Speech API The definition of 'speech synthesis events' in that specification. |
Draft |
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.enabledflag in about:config.