Websockets API question

I want to try out the new web sockets api

but i have problem get it running. The documentation is missing some parts for me to get started. What do i need to included from the GitHub project or any url? I tried the index.js from lib folder but then i get error that import is an Unexpected token. When checking the jsfiddle sample i see that another file is linked here that is not listet in the project, maybe a combined file? Also a authToken sample would be great.

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See my Gist: