#import #import // https://wicg.github.io/speech-api/#speechsynthesisutterance [Exposed=Window] interface SpeechSynthesisUtterance : EventTarget { constructor(optional DOMString text = ""); attribute DOMString text; attribute DOMString lang; attribute SpeechSynthesisVoice? voice; attribute float volume; attribute float rate; attribute float pitch; attribute EventHandler onstart; attribute EventHandler onend; attribute EventHandler onerror; attribute EventHandler onpause; attribute EventHandler onresume; attribute EventHandler onmark; attribute EventHandler onboundary; };