chart = {
const height = 500;
const margin = { top: 30, bottom: 30, left: 60, right: 30 };
const svg = d3.select(DOM.svg(width, height));
const xScale
const yScale
const xAxis
const yAxis
const g = svg
.append("g")
.selectAll("")
.data()
.enter()
.append("rect")
return svg.node();
}