Azure TTS SpeechSynthesizer.WordBoundary Event in Javascript/NOdeJS

Hi ,

i was reading about SpeechSynthesizer.WordBoundary Event , found it interesting mainly because it could help in highlighting the text (like karaoke).

It looks like it's supported in very limited languages as of now (C#,VB,F#) as per the page http://karaoke  

are there any plans to have JavaScript wrapper for such events . And if it already exists , could you please refer me to it's documentation.

Thanks!!!!