dc.js is a charting library built on top of d3.js and works natively with crossfilter, which is another popular javascript library used to explore millions of records in a short period on the client side. dc.js is a javascript library used to make interactive dashboards in javascript. this tutorial will give you a complete knowledge on the dc.js framework. this is an introductory tutorial, which covers the basics of dc.js and explains how to deal with its various modules and sub-modules.