How to browserify your library.

I tried browserifying your library to use it on the client side but it fails due to syntax error with class keyword. Any clue as to how can i go about browserifying your library.

Thanks in advance.

What version of Browserify are you using?
I'm using it also for a client side project and use version: 11.2.0. The only issue is browser support. Even while using Browserify, the class keyword remains and is currently not really great supported by browsers.