Variable SpeechSynthesisEvent
SpeechSynthesisEvent : {
prototype: SpeechSynthesisEvent;
new (type: string, eventInitDict: SpeechSynthesisEventInit): SpeechSynthesisEvent;
}
prototype: SpeechSynthesisEvent;
new (type: string, eventInitDict: SpeechSynthesisEventInit): SpeechSynthesisEvent;
}