how to properly install dc.js for using with Rails 5?

I am exploring dc.js which would provide great feature to my data quality analysis application. But I am getting crazy about how to setup the libraries to get it fully operational:

• D3 is installed thanks to the d3-rails gem
• Installation of dc.js with npm install dc simply returns dc@2.1.6 ../../../node_modules/dc, but brings no feature.

• Referencing dc.js by

  <script src="https://dc-js.github.io/dc.js/js/crossfilter.js" 
  
  

  et

  <script src="https://dc-js.github.io/dc.js/js/dc.js"></script>
  
  

generates errors such as d3.time is undefined. (does dc only relies on D3 3.x ?).

• Would http://cdnjs.cloudflare.com/ajax/libs/dc/2.0.0/dc.min.js and http://cdnjs.cloudflare.com/ajax/libs/dc/2.0.0/dc.min.css provide an up-to-date code ? But what happens if I need it on premises behind a firewall ?

• Should I download and copy all the libraries locally ?

Finally, which is the clean, lean recommended way of implementing dc.js ?

Thanks.

via user1185081