chart = {
const height = 500;
const width = 928;
const marginTop = 10;
const marginRight = 10;
const marginBottom = 20;
const marginLeft = 40;
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height])
.attr("width", width)
.attr("height", height)
.attr("style", "max-width: 100%; height: auto;");
const x = d3
.scaleBand()
.domain(names)
.range([marginLeft, width - marginRight])
.padding(0.2);
const y = d3.scaleLinear().domain([0, yMax * 1]).range([height - marginBottom, marginTop]);
const color = d3.scaleOrdinal()
.domain(stack.map(d => d.key))
.range(d3.schemeBlues[3].slice(0, 2))
.unknown("#ccc");
svg.append("g")
.selectAll()
.data(stack)
.join("g")
.attr("fill", (d, i) => color(d.key))
.selectAll("rect")
.data(D => D.map(d => (d.key = D.key, d)))
.join("rect")
.attr("x", d => x(d.data[0]))
.attr("y", d => y(d[1]))
.attr("height", d => y(d[0]) - y(d[1]))
.attr("width", x.bandwidth())
.append("title")
.text(d => `${d.data[0]} ${d.key}`);
svg.append("g")
.attr("transform", `translate(0,${height - marginBottom})`)
.call(d3.axisBottom(x).tickSizeOuter(0))
.call(g => g.selectAll(".domain").remove());
svg.append("g")
.attr("transform", `translate(${marginLeft},0)`)
.call(d3.axisLeft(y).ticks(null, "s"))
.call(g => g.selectAll(".domain").remove());
return Object.assign(svg.node(), {scales: {color}});
}