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    SpeechSynthesisEvent.charIndex

    This is an experimental technology
    Because this technology's specification has not stabilized, check the compatibility table for the proper prefixes to use in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the spec changes.

    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 Status Comment
    Web Speech API
    The definition of 'charIndex' in that specification.    		 Draft  

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
    Basic support 33 44 (44) [1] Not supported Not supported Not supported
    Feature Android Chrome Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
    Basic support ? (Yes) ? 2.5 Not supported Not supported Not supported
    • [1] Can be enabled via the media.webspeech.synth.enabled flag in about:config.

    See also

    Document Tags and Contributors

    Tags: 
     Contributors to this page: chrisdavidmills
     Last updated by: chrisdavidmills,