SpeechSynthesisEvent: elapsedTime property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2018.
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.
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
js
utterThis.onboundary = (event) => {
console.log(
`${event.name} boundary reached after ${event.elapsedTime} seconds.`,
);
};
Specifications
| Specification |
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| Web Speech API # dom-speechsynthesisevent-elapsedtime |
Browser compatibility
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elapsedTime
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elapsedTime in milliseconds
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- Partial support
- Partial support
- No support
- No support
- Non-standard. Check cross-browser support before using.
- Deprecated. Not for use in new websites.