A Better Animation System

[JacobLinCool]

Now the animation system (the animation extension) is heavily based on hard coded animation-delay.

I think maybe it can be more flexible (for example, animating multiple visible extensions) if we use the css counter as the delay value.

[JacobLinCool]

Maybe we can try server-side SVG rendering from eCharts, which says that it supports initial animation.

https://apache.github.io/echarts-handbook/en/how-to/cross-platform/server/