SpeechSynthesisUtterance: mark event

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The mark event of the Web Speech API SpeechSynthesisUtterance object is fired when the spoken utterance reaches a named SSML "mark" tag.

Bubbles No
Cancelable No
Interface SpeechSynthesisEvent
Event handler property onmark


You can use the mark event in an addEventListener method:

utterThis.addEventListener('mark', function(event) { 
  console.log('A mark was reached: ' + event.name);

Or use the onmark event handler property:

utterThis.onend = function(event) {
  console.log('A mark was reached: ' + event.name);


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

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!
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: fscholz, erikadoyle, chrisdavidmills
Last updated by: fscholz,