JSFiddle - React, Tailwind, and code Playground

by Sergio Spagnuolo

HTML

<body>
    
    <div class="chord"></div>
    
</body>

CSS

body {
  font: 10px sans-serif;
}

.chord {
  fill-opacity: .67;
}

JavaScript

var outerRadius = 960 / 2,
    innerRadius = outerRadius - 130;

var fill = d3.scale.category20c();

var chord = d3.layout.chord()
    .padding(.04)
    .sortSubgroups(d3.descending)
    .sortChords(d3.descending);

var arc = d3.svg.arc()
    .innerRadius(innerRadius)
    .outerRadius(innerRadius + 20);

var svg = d3.select("body").append("svg")
    .attr("width", outerRadius * 2)
    .attr("height", outerRadius * 2)
  .append("g")
    .attr("transform", "translate(" + outerRadius + "," + outerRadius + ")");

d3.json("readme.json", function(error, imports) {
  if (error) throw error;

  var indexByName = d3.map(),
      nameByIndex = d3.map(),
      matrix = [],
      n = 0;

  // Returns the Flare package name for the given class name.
  function name(name) {
    return name.substring(0, name.lastIndexOf(".")).substring(6);
  }

  // Compute a unique index for each package name.
  imports.forEach(function(d) {
    if (!indexByName.has(d = name(d.name))) {
      nameByIndex.set(n, d);
      indexByName.set(d, n++);
    }
  });

  // Construct a square matrix counting package imports.
  imports.forEach(function(d) {
    var source = indexByName.get(name(d.name)),
        row = matrix[source];
    if (!row) {
     row = matrix[source] = [];
     for (var i = -1; ++i < n;) row[i] = 0;
    }
    d.imports.forEach(function(d) { row[indexByName.get(name(d))]++; });
  });

  chord.matrix(matrix);

  var g = svg.selectAll(".group")
      .data(chord.groups)
    .enter().append("g")
      .attr("class", "group");

  g.append("path")
      .style("fill", function(d) { return fill(d.index); })
      .style("stroke", function(d) { return fill(d.index); })
      .attr("d", arc);

  g.append("text")
      .each(function(d) { d.angle = (d.startAngle + d.endAngle) / 2; })
      .attr("dy", ".35em")
      .attr("transform", function(d) {
        return "rotate(" + (d.angle * 180 / Math.PI - 90) + ")"
            + "translate(" + (innerRadius + 26) + ")"
            + (d.angle >...