{
const width = 500, height = 500;
const svg = html`<svg viewBox="0 0 ${width} ${height}" width="${width}" height="${height}"></svg>`;
const selSvg = d3.select(svg);
selSvg
.append("circle")
.attr("r", 50)
.attr("cx", width / 2)
.attr("cy", height / 2)
.attr("fill", "steelblue");
return svg;
}