This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The onstart
property of the SpeechSynthesisUtterance
interface represents an event handler that will run when the utterance has begun to be spoken (when the start
event fires.)
This occurs when the SpeechSynthesis.speak()
method is invoked.
Syntax
speechSynthesisUtteranceInstance.onstart = function() { ... };
Examples
var synth = window.speechSynthesis;
var inputForm = document.querySelector('form');
var inputTxt = document.querySelector('input');
var voiceSelect = document.querySelector('select');
var voices = synth.getVoices();
...
inputForm.onsubmit = function(event) {
event.preventDefault();
var utterThis = new SpeechSynthesisUtterance(inputTxt.value);
var selectedOption = voiceSelect.selectedOptions[0].getAttribute('data-name');
for(i = 0; i < voices.length ; i++) {
if(voices[i].name === selectedOption) {
utterThis.voice = voices[i];
}
}
synth.speak(utterThis);
utterThis.onstart = function(event) {
console.log('We have started uttering this speech: ' + event.utterance.text);
}
inputTxt.blur();
}
Specifications
Specification | Status | Comment |
---|---|---|
Web Speech API The definition of 'onstart' in that specification. |
Draft |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | 33 | (Yes) | 49 (49) | No support | ? | 7 |
Feature | Android | Chrome | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | No support | 2.0 | No support | No support | 7.1 |
See also
Document Tags and Contributors
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Contributors to this page:
abbycar,
chrisdavidmills
Last updated by:
abbycar,