The cancel() method of the SpeechSynthesis interface removes all utterances from the utterance queue.
The getVoices() method of the SpeechSynthesis interface returns a list of SpeechSynthesisVoice objects representing all the available voices on the current device.
The onvoiceschanged property of the SpeechSynthesis interface represents an event handler that will run when the list of SpeechSynthesisVoice objects that would be returned by the SpeechSynthesis.getVoices() method has changed (when the voiceschanged event fires.)
The pause() method of the SpeechSynthesis interface puts the SpeechSynthesis object into a paused state.
The paused read-only property of the SpeechSynthesis interface is a Boolean that returns true if the SpeechSynthesis object is in a paused state, or false if not.
The pending read-only property of the SpeechSynthesis interface is a Boolean that returns true if the utterance queue contains as-yet-unspoken utterances.
The resume() method of the SpeechSynthesis interface puts the SpeechSynthesis object into a non-paused state: resumes it if it was already paused.
The speak() method of the SpeechSynthesis interface adds an utterance to the utterance queue; it will be spoken when any other utterances queued before it have been spoken.
The speaking read-only property of the SpeechSynthesis interface is a Boolean that returns true if an utterance is currently in the process of being spoken — even if SpeechSynthesis is in a paused state.