chart = {
debugger;
const links = data.links.map(d => Object.create(d));
const nodes = data.nodes.map(d => Object.create(d));
const hasLabel = nodes.map(d => d.label).filter(d => d).length > 0;
const simulation = d3.forceSimulation(nodes)
.force("link", d3.forceLink(links).id(d => d.id))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2));
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
const translate = (x, y) => `translate(${x}, ${y})`;
const link = svg.append("g")
.selectAll("line")
.data(links)
.join("line");
function setAttr(sel) {
sel.each((d, i, e) => {
for (const [k, v] of Object.entries(d.attr)) {
e[i].setAttribute(k, v);
}
});
}
link
.attr("stroke", "#999")
.attr("stroke-opacity", 0.6)
.filter(d => d.value !== undefined)
.attr("stroke-width", d => Math.sqrt(d.value));
link.filter(d => d.attr !== undefined)
.call(setAttr);
const node = svg.append("g")
.selectAll("circle")
.data(nodes)
.join("circle")
.attr("r", 5)
.attr("fill", color)
.attr("stroke", "#fff")
.attr("stroke-width", 1.5)
.call(drag(simulation));
node.filter(d => d.attr !== undefined)
.call(setAttr);
node.append("title")
.text(d => d.id);
const labels = svg.append("g")
.selectAll("g")
.data(nodes.filter(d => d.label))
.enter()
.append("g")
.classed("label-box", true)
.filter(d => d.priority !== undefined)
.attr("data-priority", d => d.priority);
labels.append("text")
.classed("glow", true)
.attr("stroke", "#fff")
.attr("stroke-width", 5)
.text(d => d.label);
labels.append("text")
.attr("fill", "black")
.text(d => d.label);
simulation.on("tick", () => {
link
.attr("x1", d => d.source.x)
.attr("y1", d => d.source.y)
.attr("x2", d => d.target.x)
.attr("y2", d => d.target.y);
node
.attr("cx", d => d.x)
.attr("cy", d => d.y);
labels.selectAll("text")
.attr("x", d => d.x)
.attr("y", d => d.y);
onTick();
});
invalidation.then(() => simulation.stop());
return svg.node();
}
onTick = function() {}
data = FileAttachment("miserables.json").json()
height = 600
color = {
const scale = d3.scaleOrdinal(d3.schemeCategory10);
return d => scale(d.group);
}
drag = simulation => {
function dragstarted(event) {
if (!event.active) simulation.alphaTarget(0.3).restart();
event.subject.fx = event.subject.x;
event.subject.fy = event.subject.y;
}
function dragged(event) {
event.subject.fx = event.x;
event.subject.fy = event.y;
}
function dragended(event) {
if (!event.active) simulation.alphaTarget(0);
event.subject.fx = null;
event.subject.fy = null;
}
return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
d3 = require("d3@6")
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.
