SpeechSynthesisVoice.localService

The localService read-only property of the SpeechSynthesisVoice interface returns a boolean value 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.

Value

A boolean value.

Examples

for (let i = 0; i < voices.length ; i++) {
  const 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
Web Speech API
# dom-speechsynthesisvoice-localservice

Browser compatibility

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See also