C3.js deserves its place in this list of the best JS libraries available in 2021. The library has been around a long time, is super-clean, customizable to suit many needs, and has a good range of charts to work with. Built upon the renowned D3.js charting engine, C3.js offers a maintained, up-to-date visualization experience that is perfect for most use-cases.
Notable Feature List
- ‘Zoomable’ sub-charts
- Appealing animations
- Highly customizable
- Excellent documentation with code examples and demonstrations