I just did a quick search to see if it was possible and it seemed from the results that it wasn't. From a Chrome Web App it might be but they are getting deprecated soon.
I don't profess to be an expert though. If you can find some code that works - or even better if you could modify the Web IDE at https://github.com/espruino/EspruinoWebIDE to make it work then it'd be amazing!
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I just did a quick search to see if it was possible and it seemed from the results that it wasn't. From a Chrome Web App it might be but they are getting deprecated soon.
I don't profess to be an expert though. If you can find some code that works - or even better if you could modify the Web IDE at https://github.com/espruino/EspruinoWebIDE to make it work then it'd be amazing!