abstract member lang: string with get, set
abstract member onboundary: (SpeechSynthesisEvent -> unit) option with get, set
abstract member onend: (SpeechSynthesisEvent -> unit) option with get, set
abstract member onerror: (SpeechSynthesisErrorEvent -> unit) option with get, set
abstract member onmark: (SpeechSynthesisEvent -> unit) option with get, set
abstract member onpause: (SpeechSynthesisEvent -> unit) option with get, set
abstract member onresume: (SpeechSynthesisEvent -> unit) option with get, set
abstract member onstart: (SpeechSynthesisEvent -> unit) option with get, set
abstract member pitch: float with get, set
abstract member rate: float with get, set
abstract member text: string with get, set
abstract member voice: SpeechSynthesisVoice option with get, set
abstract member volume: float with get, set