This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The boundary event of the Web Speech API is fired when the spoken utterance reaches a word or sentence boundary.
| Bubbles | No |
|---|---|
| Cancelable | No |
| Interface | SpeechSynthesisEvent |
| Event handler | onboundary |
Examples
You can use the boundary event in an addEventListener method:
utterThis.addEventListener('boundary', function(event) {
console.log(event.name + ' boundary reached after ' + event.elapsedTime + ' milliseconds.');
});
Or use the onboundary event handler property:
utterThis.onboundary = function(event) {
console.log(event.name + ' boundary reached after ' + event.elapsedTime + ' milliseconds.');
}
Specifications
| Specification | Status | Comment |
|---|---|---|
| Web Speech API The definition of 'speech synthesis utterance events' in that specification. |
Draft |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
boundary event | Chrome Full support 33 | Edge Full support 14 | Firefox Full support 49 | IE No support No | Opera Full support 21 | Safari Full support 7 | WebView Android No support No | Chrome Android Full support 33 | Edge Mobile Full support Yes | Firefox Android
Full support
62
| Opera Android No support No | Safari iOS Full support 7.1 | Samsung Internet Android ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- User must explicitly enable this feature.
- User must explicitly enable this feature.