Client-side?

[alexiskattan]

Is there a way to make this client-side and run in the browser?

[nhunzaker]

Possibly! I do not currently test against the browser, but it's possible using a build tool such as Browserify or Webpack.

The biggest challenge would be the over all file size. To calculate sentiment, I'm using a rather large corpus of words. This may be prohibitively large for your project.

Still, give it a shot!