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boundary

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 boundary event of the Web Speech API is fired when the spoken utterance reaches a word or sentence boundary.

Bubbles No
Cancelable No
Target objects SpeechSynthesisUtterance
Interface SpeechSynthesisEvent

Examples

utterThis.onboundary = function(event) {
  console.log(event.name + ' boundary reached after ' + event.elapsedTime + ' milliseconds.');
}

Inheritance

The boundary event implements the SpeechSynthesisEvent interface, which inherits from Event. It therefore has available the properties and methods defined on both these interfaces.

Specifications

Specification Status Comment
Web Speech API
The definition of 'speech synthesis utterance events' in that specification.
Draft  

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 33 (Yes) 44 (44) [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) ? 2.5 No support No support No support
  • [1] Can be enabled via the media.webspeech.synth.enabled flag in about:config.

See also

Document Tags and Contributors

 Contributors to this page: erikadoyle, chrisdavidmills
 Last updated by: erikadoyle,