chart = svg`<svg viewBox="0 0 ${width} ${height}">
<g fill="steelblue">${data.map(d => svg`
<rect
x="${x(d.name)}"
y="${y1(d.values)}"
height="${y(0) - y1(d.values)}"
width="${x.bandwidth()}"></rect>
`)}</g>
${d3.select(svg`<g>`).call(xAxis).node()}
${d3.select(svg`<g>`).call(yAxis).node()}
</svg>`