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@mbostock mbostock/README.md
Created Jul 23, 2018

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A demonstration of repurposing code from an Observable notebook without Observable’s reactive runtime.

import {require} from "https://unpkg.com/d3-require@1?module";
export default async function() {
const d3 = await require("d3@5");
const width = 640;
const radius = width / 2;
const line = d3.radialLine()
.curve(d3.curveBundle.beta(0.85))
.radius(d => d.y)
.angle(d => d.x);
const tree = d3.cluster().size([2 * Math.PI, radius - 100]);
const data = await loadData();
const root = tree(d3.hierarchy(data));
const map = new Map(root.leaves().map(d => [d.data.id, d]));
const svg = d3.create("svg")
.attr("width", width)
.attr("height", width)
.attr("viewBox", `${-width / 2} ${-width / 2} ${width} ${width - 40}`)
.style("max-width", "100%")
.style("height", "auto")
.style("display", "block")
.style("margin", "auto")
.style("font", "10px sans-serif");
svg.append("g")
.attr("fill", "none")
.attr("stroke", "steelblue")
.attr("stroke-opacity", 0.5)
.selectAll("path")
.data(d3.merge(root.leaves().map(d => d.data.targets.map(i => d.path(map.get(i))))))
.enter().append("path")
.style("mix-blend-mode", "multiply")
.attr("d", line);
svg.append("g")
.selectAll("text")
.data(root.leaves())
.enter().append("text")
.attr("transform", d => `
rotate(${d.x * 180 / Math.PI - 90})
translate(${d.y},0)${d.x >= Math.PI ? `
rotate(180)` : ""}
`)
.attr("dy", "0.31em")
.attr("x", d => d.x < Math.PI ? 3 : -3)
.attr("text-anchor", d => d.x < Math.PI ? "start" : "end")
.text(d => d.data.id);
return svg.node();
}
async function loadData() {
const {nodes, links} = await require("@observablehq/miserables@0.0");
const map = new Map;
for (const node of nodes) {
let group = map.get(node.group);
if (!group) map.set(node.group, group = {name: node.group, children: []});
group.children.push(node);
node.targets = [];
}
for (const {source, target} of links) {
source.targets.push(target.id);
}
return {name: "miserables", children: [...map.values()]};
}
<!DOCTYPE html>
<div id="chart"></div>
<script type="module">
import chart from "./d3-hierarchical-edge-bundling-ii.js";
chart().then(chart => document.querySelector("#chart").append(chart));
</script>
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