SpeechSynthesisEvent.elapsedTime

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 elapsedTime read-only property of the SpeechSynthesisUtterance interface returns the elapsed time in milliseconds after the SpeechSynthesisUtterance.text started being spoken that the event was triggered at.

Syntax

JavaScript
event.elapsedTime;

Value

A float.

Examples

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

Specifications

Specification Status Comment
Web Speech API
The definition of 'elapsedTime' in that specification.
Draft  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 33 49 (49) No support ? 7
Feature Android Chrome Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support (Yes) (Yes) No support 2.0 No support No support 7.1

See also

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/speechsynthesisevent/elapsedtime

API elapsedTime Experimental Property Reference speech SpeechSynthesisEvent synthesis Web Speech API