While I like echarts I have found it somewhat challenging to extend their functionality.
I wanted a Gantt chart and while I did achieve what I wanted it wasn't without having to delve into the their source and putting log statements everywhere.
I happen to be using ant design and I've had the same issues there.
Its a bit all over the place and the translations are not great, but i will stick with it.
Also using Ant Design with eCharts. Having to funnel the designers to not use gradients for all the charts has been fun. While eCharts supports _some_ gradients, it's been a PITA for certain chart types.
I also made the mistake of using Ant Design Pro Forms since I wanted to use the StepForm Wizard component. All of the tsdocs are in Chinese and it's barely documented for more than their example use cases :'}
Some parts of the api are a bit confusing especially with more recent version upgrades but I still have found it to be the most powerful open source library that’s not D3.
I wanted a Gantt chart and while I did achieve what I wanted it wasn't without having to delve into the their source and putting log statements everywhere.
I happen to be using ant design and I've had the same issues there.
Its a bit all over the place and the translations are not great, but i will stick with it.