This is a gem that makes ua-parser-js available to the Rails asset pipeline.

Add this line to your application's Gemfile:

gem 'ua-parser-js-rails', github: 'viki-org/ua-parser-js-rails'

And then execute:

$ bundle

Include the following line to your application.js

//= require ua-parser.js

For details usage in js, please refer to https://github.com/faisalman/ua-parser-js