版本:0.7.20
- https://cdn.bootcdn.net/ajax/libs/c3/0.7.20/c3.css
- https://cdn.bootcdn.net/ajax/libs/c3/0.7.20/c3.js
- https://cdn.bootcdn.net/ajax/libs/c3/0.7.20/c3.min.css
- https://cdn.bootcdn.net/ajax/libs/c3/0.7.20/c3.min.js
D3-based reusable chart library