chart = { const width = 928; const height = width + 140; const radius = width / 6; const hierarchyData = d3.hierarchy({ name: "World", children: Array.from( d3.group(data, d => d.Continent), ([name, children]) => ({ name, children }) ) }) .sum(d => d["2022 Population"] || 0) .sort((a, b) => b.value - a.value); const root = d3.partition() .size([2 * Math.PI, hierarchyData.height + 1])(hierarchyData); root.each(d => d.current = d); const continents = Array.from(new Set(data.map(d => d.Continent))); const format = d3.format(",d"); const arc = d3.arc() .startAngle(d => d.x0) .endAngle(d => d.x1) .padAngle(d => Math.min((d.x1 - d.x0) / 2, 0.005)) .padRadius(radius * 1.5) .innerRadius(d => d.y0 * radius) .outerRadius(d => Math.max(d.y0 * radius, d.y1 * radius - 1)); const getNodeName = d => d.data.name || d.data["Country/Territory"] || "Unknown"; const container = html`

`; const tooltip = d3.select(container) .append("div") .style("position", "absolute") .style("pointer-events", "none") .style("background", "rgba(0,0,0,0.8)") .style("color", "white") .style("padding", "8px 10px") .style("border-radius", "6px") .style("font", "12px sans-serif") .style("line-height", "1.35") .style("opacity", 0); const svg = d3.create("svg") .attr("viewBox", [-width / 2, -height / 2 - 70, width, height]) .style("font", "12px sans-serif") .style("background", "white"); container.append(svg.node()); svg.append("text") .attr("x", 0) .attr("y", -height / 2 + 25) .attr("text-anchor", "middle") .attr("font-size", 22) .attr("font-weight", "bold") .text("World Population Sunburst"); svg.append("text") .attr("x", 0) .attr("y", -height / 2 + 48) .attr("text-anchor", "middle") .attr("font-size", 13) .attr("fill", "#444") .text("2022 population by continent and country"); const g = svg.append("g"); const path = g.append("g") .selectAll("path") .data(root.descendants().slice(1)) .join("path") .attr("fill", d => { let current = d; while (current.depth > 1) current = current.parent; return color(getNodeName(current)); }) .attr("fill-opacity", d => arcVisible(d.current) ? (d.children ? 0.7 : 0.45) : 0) .attr("pointer-events", d => arcVisible(d.current) ? "auto" : "none") .attr("stroke", "#fff") .attr("stroke-width", 1) .attr("d", d => arc(d.current)) .on("mousemove", function(event, d) { const names = d.ancestors().map(getNodeName).reverse().join(" → "); const pct = ((d.value / root.value) * 100).toFixed(2); tooltip .style("opacity", 1) .html(`

${names}

Population: ${format(d.value)}

Share of world: ${pct}%

`) .style("left", `${event.offsetX + 12}px`) .style("top", `${event.offsetY + 12}px`); }) .on("mouseleave", function() { tooltip.style("opacity", 0); }); path.filter(d => d.children) .style("cursor", "pointer") .on("click", clicked); const label = g.append("g") .attr("pointer-events", "none") .attr("text-anchor", "middle") .style("user-select", "none") .selectAll("text") .data(root.descendants().slice(1)) .join("text") .attr("dy", "0.35em") .attr("fill", "#111") .attr("font-size", d => d.depth === 1 ? 15 : 7) .attr("font-weight", d => d.depth === 1 ? "bold" : "normal") .attr("fill-opacity", d => +labelVisible(d.current, d)) .attr("transform", d => labelTransform(d.current)) .text(d => getNodeName(d)); const parent = g.append("circle") .datum(root) .attr("r", radius) .attr("fill", "#f5f5f5") .attr("stroke", "#bbb") .attr("pointer-events", "all") .on("click", clicked); g.append("text") .attr("text-anchor", "middle") .attr("dy", "-0.2em") .attr("font-size", 15) .attr("font-weight", "bold") .text("World"); g.append("text") .attr("text-anchor", "middle") .attr("dy", "1.2em") .attr("font-size", 11) .attr("fill", "#555") .text("Click center to zoom out"); const legend = svg.append("g") .attr("transform", `translate(${-width / 2 + 25}, ${height / 2 - 55})`); legend.selectAll("g") .data(continents) .join("g") .attr("transform", (d, i) => `translate(${i * 140}, 0)`) .call(g => { g.append("rect") .attr("width", 14) .attr("height", 14) .attr("rx", 2) .attr("fill", d => color(d)); g.append("text") .attr("x", 20) .attr("y", 11) .attr("font-size", 12) .text(d => d); }); function clicked(event, p) { parent.datum(p.parent || root); root.each(d => d.target = { x0: Math.max(0, Math.min(1, (d.x0 - p.x0) / (p.x1 - p.x0))) * 2 * Math.PI, x1: Math.max(0, Math.min(1, (d.x1 - p.x0) / (p.x1 - p.x0))) * 2 * Math.PI, y0: Math.max(0, d.y0 - p.depth), y1: Math.max(0, d.y1 - p.depth) }); const t = g.transition().duration(750); path.transition(t) .tween("data", d => { const i = d3.interpolate(d.current, d.target); return t => d.current = i(t); }) .filter(function(d) { return +this.getAttribute("fill-opacity") || arcVisible(d.target); }) .attr("fill-opacity", d => arcVisible(d.target) ? (d.children ? 0.7 : 0.45) : 0) .attr("pointer-events", d => arcVisible(d.target) ? "auto" : "none") .attrTween("d", d => () => arc(d.current)); label .filter(function(d) { return +this.getAttribute("fill-opacity") || labelVisible(d.target, d); }) .transition(t) .attr("fill-opacity", d => +labelVisible(d.target, d)) .attrTween("transform", d => () => labelTransform(d.current)); } function arcVisible(d) { return d.y1 <= 3 && d.y0 >= 1 && d.x1 > d.x0; } function labelVisible(layoutNode, originalNode) { if (!(layoutNode.y1 <= 3 && layoutNode.y0 >= 1 && layoutNode.x1 > layoutNode.x0)) { return false; } if (originalNode.depth === 1) { return (layoutNode.x1 - layoutNode.x0) > 0.01; } if (originalNode.depth === 2) { return (layoutNode.y1 - layoutNode.y0) * (layoutNode.x1 - layoutNode.x0) > 0.008; } return false; } function labelTransform(d) { const x = ((d.x0 + d.x1) / 2) * 180 / Math.PI; const y = ((d.y0 + d.y1) / 2) * radius; return `rotate(${x - 90}) translate(${y},0) rotate(${x < 180 ? 0 : 180})`; } return container; }