Charts that pull their data from the internetURL copied
A choropleth — two remote files joined in the browserURL copied
A TopoJSON county map and a separate unemployment table, joined by FIPS code with a lookup transform. Two fetches, one chart, no build step.
US unemployment rate by county
This one sets a fixed width in the spec, because a projection needs real pixels rather than the container's width. It is narrower than the column, so it sits centred with even space either side.