SpeechSynthesisVoice.localService

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 localService read-only property of the SpeechSynthesisVoice interface returns a Boolean indicating whether the voice is supplied by a local speech synthesizer service (true), or a remote speech synthesizer service (false.)

This property is provided to allow differentiation in the case that some voice options are provided by a remote service; it is possible that remote voices might have extra latency, bandwidth or cost associated with them, so such distinction may be useful.

Syntax

var amILocal = speechSynthesisVoiceInstance.localService;

Value

A Boolean.

Examples

for(i = 0; i < voices.length ; i++) {
  var option = document.createElement('option');
  option.textContent = voices[i].name + ' (' + voices[i].lang + ')';
 
  if(voices[i].default) {
    option.textContent += ' -- DEFAULT';
  }

  console.log(voices[i].localService);

  option.setAttribute('data-lang', voices[i].lang);
  option.setAttribute('data-name', voices[i].name);
  voiceSelect.appendChild(option);
}

Specifications

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

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.

SpeechSynthesisVoice.localService

Syntax

Value

Examples

Specifications

Browser compatibility

See also

Document Tags and Contributors