C3 Donut

D3.js is a powerful JavaScript library for manipulating documents based on data, but it can be complex. C3.js is a D3-based reusable chart library.

Comfortable

C3 makes it easy to generate D3-based charts by wrapping the code required to construct the entire chart. We don't need to write D3 code any more.

Customizable

C3 gives some classes to each element when generating, so you can define a custom style by the class and it's possible to extend the structure directly by D3.

Controllable

C3 provides a variety of APIs and callbacks to access the state of the chart. By using them, you can update the chart even after it's rendered.