How can i use piechart with toastui-editor-plugin-chart in Editor

[Volcaner]

I get the demo on the page 12. Editor with All Plugins
like,

$$chart
,category1,category2
Jan,21,23
Feb,31,17

type: column
title: Monthly Revenue
x.title: Amount
y.title: Month
y.min: 1
y.max: 40
y.suffix: $
$$

But, i tryed hard for pie!!!
Like this,

$$chart
,category1
Jan,21
Feb,31

type: pie
title: Monthly Revenue
$$

It return invalid chart data whatever i tryed.
So, can you show me how to use it?

[Volcaner]

welcome to join the discussion, i need your help

[Volcaner]

@shiren @extremeFE @1ambda @junghwan-park

[Volcaner]

I got one case,
like,

$$chart
Chrome,IE,Opera,Safari
50,20,30,90

type: pie
title: Monthly Revenue
series.dataLabels.visible:true
series.dataLabels.pieSeriesName.visible:true
series.dataLabels.pieSeriesName.anchor:outer
series.radiusRange.inner:40%
series.radiusRange.outer:150%
$$