chart = {
const x = d3.scaleLinear().rangeRound([0, width]);
const y = d3.scaleLinear().rangeRound([0, height]);
const svg = d3
.create("svg")
.attr("viewBox", [0.5, -30.5, width, height + 30])
.style("font", "20px bebas neue")
.style("fill", "#fff");
let group = svg.append("g").call(render, treemap(data));
function render(group, root) {
const node = group
.selectAll("g")
.data(root.children.concat(root))
.join("g");
node
.filter(d => (d === root ? d.parent : d.children))
.attr("cursor", "pointer")
.on("click", d => (d === root ? zoomout(root) : zoomin(d)));
node.append("title").text(
d =>
`${d
.ancestors()
.map(d => d.data.name)
.reverse()
.slice(1)
.join(" + ")}\nsatisfied by ${format(d.data.widgets)} widgets `
);
node
.append("rect")
.attr("id", d => (d.leafUid = DOM.uid("leaf")).id)
.attr("fill", d => {
return color(d.data.name);
})
.attr("stroke", "#fff");
node
.append("clipPath")
.attr("id", d => (d.clipUid = DOM.uid("clip")).id)
.append("use")
.attr("xlink:href", d => d.leafUid.href);
node
.append("text")
.attr("clip-path", d => d.clipUid)
.attr("font-weight", d => (d === root ? "bold" : null))
.selectAll("tspan")
.data(d =>
(d === root ? name(d) : d.data.name)
.split(/(?=[A-Z][^A-Z])/g)
.concat(format(d.data.widgets))
)
.join("tspan")
.attr("x", 3)
.attr(
"y",
(d, i, nodes) => `${(i === nodes.length - 1) * 0.3 + 1.1 + i * 0.9}em`
)
.attr("fill-opacity", (d, i, nodes) =>
i === nodes.length - 1 ? 0.7 : null
)
.attr("font-weight", (d, i, nodes) =>
i === nodes.length - 1 ? "normal" : null
)
.text(d => d);
group.call(position, root);
}
function position(group, root) {
group
.selectAll("g")
.attr("transform", d =>
d === root ? `translate(0,-30)` : `translate(${x(d.x0)},${y(d.y0)})`
)
.select("rect")
.attr("width", d => (d === root ? width : x(d.x1) - x(d.x0)))
.attr("height", d => (d === root ? 30 : y(d.y1) - y(d.y0)));
}
// When zooming in, draw the new nodes on top, and fade them in.
function zoomin(d) {
const group0 = group.attr("pointer-events", "none");
const group1 = (group = svg.append("g").call(render, d));
x.domain([d.x0, d.x1]);
y.domain([d.y0, d.y1]);
svg
.transition()
.duration(750)
.call(t =>
group0
.transition(t)
.remove()
.call(position, d.parent)
)
.call(t =>
group1
.transition(t)
.attrTween("opacity", () => d3.interpolate(0, 1))
.call(position, d)
);
}
// When zooming out, draw the old nodes on top, and fade them out.
function zoomout(d) {
const group0 = group.attr("pointer-events", "none");
const group1 = (group = svg.insert("g", "*").call(render, d.parent));
x.domain([d.parent.x0, d.parent.x1]);
y.domain([d.parent.y0, d.parent.y1]);
svg
.transition()
.duration(750)
.call(t =>
group0
.transition(t)
.remove()
.attrTween("opacity", () => d3.interpolate(1, 0))
.call(position, d)
)
.call(t => group1.transition(t).call(position, d.parent));
}
return svg.node();
}
data = FileAttachment("HierarchyByChildrenD3Partition.json").json()
treemap = data => d3.treemap()
.tile(tile)
(d3.hierarchy(data)
.sum(d => d.value)
.sort((a, b) => b.value - a.value))
function tile(node, x0, y0, x1, y1) {
d3.treemapBinary(node, 0, 0, width, height);
for (const child of node.children) {
child.x0 = x0 + child.x0 / width * (x1 - x0);
child.x1 = x0 + child.x1 / width * (x1 - x0);
child.y0 = y0 + child.y0 / height * (y1 - y0);
child.y1 = y0 + child.y1 / height * (y1 - y0);
}
}
color = d3.scaleOrdinal(d3.schemeCategory10)
name = d =>
d
.ancestors()
.map(d => d.data.name)
.reverse()
.slice(1)
.join(" + ")
width = 954
height = 924
format = d3.format(",d")
d3 = require("d3@5")
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
