[Feature] Is there a way to safely override Echarts styling / rendering?

[lwangsf]

What problem does this feature solve?

Hi there. If we want to have different styling options, or support different behavior in a chart than the default Echarts options, is there a way for us to customize Echarts in a safe / reliable way? Thank you!

What does the proposed API look like?

N/A

[helgasoft]

Most of the API is about styling - color, opacity, width, format, etc.
There is an official tool theme-builder. There is also extraCssText available for several chart elements.

[lwangsf]

Thanks @helgasoft for responding!

We were trying to customize the behavior (not just the styling) of the pie chart. See #20626, where we wrote custom rendering code. Is this a reliable way to customize Echarts behavior, or we are not expected to use Echarts this way?

Thanks in advance. I really appreicate your help!