I built a Sankey diagram in R using networkD3 package and I wanted to add text-shadow to the node labels. Actually, what I need is for the text to be in some way outlined because my original data is very complex and some of the text gets confused with the "lines" connecting the nodes. This was the approach I found on StackOverflow that should work fine, but if anyone has any other idea, I am open for new approaches.

I found a question whose implementation seems to be very similar to mine: