The elapsedTime read-only property of the SpeechSynthesisEvent returns the elapsed time in seconds, after the SpeechSynthesisUtterance.text started being spoken, at which the event was triggered.
SpeechSynthesisEvent.elapsedTime
Value
A float containing the elapsed time, in seconds.
Note: Early versions of the specification required the elapsed time in milliseconds. Check the compatibility table below for your browser.
Examples
utterThis.onboundary = function(event) { console.log(event.name + ' boundary reached after ' + event.elapsedTime + ' seconds.'); }
Specifications
| Specification |
|---|
| Web Speech API # dom-speechsynthesisevent-elapsedtime |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
elapsedTime |
33
|
14
|
49
|
No
|
21
|
7
|
No
|
33
|
62
|
No
|
7
|
3.0
|
milliseconds |
33
|
14
|
49-95
Windows and macOS only.
|
No
|
21
|
7-14.1
|
No
|
33
|
No
|
No
|
7-14.5
|
3.0
|
See also
© 2005–2021 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisEvent/elapsedTime
