Icicle

This “icicle” diagram uses d3.layout.partition to divide space with area proportional to the value of nodes in a tree. See also the zoomable icicle.

<!DOCTYPE html>
<meta charset="utf-8">
<title>Partition - Icicle</title>
<style>

.node {
  fill: #ddd;
  stroke: #fff;
}

.label {
  font: 10px sans-serif;
  text-anchor: middle;
}

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var width = 960,
    height = 500;

var color = d3.scale.category20();

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

var partition = d3.layout.partition()
    .size([width, height])
    .value(function(d) { return d.size; });

d3.json("flare.json", function(error, root) {
  if (error) throw error;

var nodes = partition.nodes(root);

svg.selectAll(".node")
      .data(nodes)
    .enter().append("rect")
      .attr("class", "node")
      .attr("x", function(d) { return d.x; })
      .attr("y", function(d) { return d.y; })
      .attr("width", function(d) { return d.dx; })
      .attr("height", function(d) { return d.dy; })
      .style("fill", function(d) { return color((d.children ? d : d.parent).name); });

svg.selectAll(".label")
      .data(nodes.filter(function(d) { return d.dx > 6; }))
    .enter().append("text")
      .attr("class", "label")
      .attr("dy", ".35em")
      .attr("transform", function(d) { return "translate(" + (d.x + d.dx / 2) + "," + (d.y + d.dy / 2) + ")rotate(90)"; })
      .text(function(d) { return d.name; });
});

</script>

https://d3js.org/d3.v3.min.js