SpeechSynthesisEvent.charIndex

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

The charIndex read-only property of the SpeechSynthesisUtterance interface returns the index position of the character in the SpeechSynthesisUtterance.text that was being spoken when the event was triggered.

Syntax

event.charIndex;

Value

A number.

Examples

utterThis.onpause = function(event) {
  var char = event.utterance.text.charAt(event.charIndex);
  console.log('Speech paused at character ' + event.charIndex + ' of "' +
  event.utterance.text + '", which is "' + char + '".');
}

Specifications

Specification
Web Speech API # dom-speechsynthesisevent-charindex

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
`charIndex`	33	14	49	No	21	7	No	33	62	No	7	3.0