SpeechSynthesisEvent.elapsedTime

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

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

Syntax

event.elapsedTime;

Value

A float.

Examples

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

Specifications

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

Browser compatibility

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

See also

Document Tags and Contributors

 Contributors to this page: aarongustafson, abbycar, chrisdavidmills
 Last updated by: aarongustafson,