Issue with formatting values in the tooltip

[giladwenig]

Issue:

In my streamgraph, I’m trying to format population values in the tooltip with commas (e.g., 314199 becomes 314,199) and bold the relevant country name. However, despite using d3.format(',') and HTML tags, the formatting doesn't appear in the tooltip.

Request:

Any advice on how to properly format these values?

Thanks!