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SpeechSynthesisEvent: elapsedTime property

files/en-us/web/api/speechsynthesisevent/elapsedtime/index.md

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{{APIRef("Web Speech API")}}

The elapsedTime read-only property of the {{domxref("SpeechSynthesisEvent")}} returns the elapsed time in seconds, after the {{domxref("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

{{Specifications}}

Browser compatibility

{{Compat}}

See also