{
const context = DOM.context2d(width, height)
yield context.canvas;
const path = d3.geoPath(projection, context)
const response = await fetch('https://flatgeobuf.org/test/data/UScounties.fgb')
for await (let feature of flatgeobuf.deserialize(response.body))
context.beginPath(), path(feature), context.stroke()
}