SpeechSynthesisEvent.elapsedTime

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

utterThis.onboundary = (event) => {
  console.log(`${event.name} boundary reached after ${event.elapsedTime} seconds.`);
}

Specifications

Specification
Web Speech API
# dom-speechsynthesisevent-elapsedtime

Browser compatibility

BCD tables only load in the browser

See also