19👍
✅
fillColor uses rgba. a = alpha. you can set alpha value to 0. such as
fillColor: "rgba(220,220,220,0)"
this should give it a transparent fill color and still display the border colors assuming you have them not transparent.
2👍
I know its very late, but we can achieve empty bar chart with only the border visible by setting the property : fill:false
Hope it helps someone 🙂
Source:stackexchange.com