We should use a single CDN (by default), either jsdelivr or cdnjs. Currently, we are loading C3.js from cdnjs while Chartist and Chart.js are loaded from jsdelivr.
I have a slight preference toward jsdelivr since it has Points of Presence (POP) in mainland China (and a broader network: https://www.jsdelivr.com/network).
We should use a single CDN (by default), either jsdelivr or cdnjs. Currently, we are loading C3.js from cdnjs while Chartist and Chart.js are loaded from jsdelivr.
I have a slight preference toward jsdelivr since it has Points of Presence (POP) in mainland China (and a broader network: https://www.jsdelivr.com/network).