SpeechSynthesisUtterance: boundary event
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
The boundary event of the Web Speech API is fired when the spoken utterance reaches a word or sentence boundary.
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
js
addEventListener("boundary", (event) => { })
onboundary = (event) => { }
Event type
A SpeechSynthesisEvent. Inherits from Event.
Examples
You can use the boundary event in an addEventListener method:
js
utterThis.addEventListener("boundary", (event) => {
console.log(
`${event.name} boundary reached after ${event.elapsedTime} seconds.`,
);
});
Or use the onboundary event handler property:
js
utterThis.onboundary = (event) => {
console.log(
`${event.name} boundary reached after ${event.elapsedTime} seconds.`,
);
};
Specifications
| Specification |
|---|
| Web Speech API # eventdef-speechsynthesisutterance-boundary |
| Web Speech API # dom-speechsynthesisutterance-onboundary |