I think something from @d3/histogram changed, I'm just seeing the unemployment rate from the example there. I fixed it by changing the code to: Histogram(intensities, { label: "Intensity →", width, height: 500, color: "steelblue" }) I also modified the import line to: import {Histogram} from "@d3/histogram" At least I think I fixed it, I might be mistaken!

Yes! Thanks for the catch!