How to authenticate with Google via OAuth 2.0 in a popup?

Question

Sorry for a big edit. I am starting over as I am not stating my question correctly.

I am trying to write a client side app in HTML5. I do not want it to be hosted on

Answer 1

I've written a mini JS library for the task, take it and see if it works for you.

https://github.com/timdream/wordcloud/blob/6d483cd91378e35b54e54efbc6f46ad2dd634113/go2.js

I am recently developing another project that rely on the same script, so I am isolating this one into an independent library project ... check the progress follows (if there are).