D3 Examples - NZ Sankey Energy tests (new Sankey)

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<!DOCTYPE html>
<svg width="950" height="1000"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="sankey.js"></script>
<script>
​
var svg = d3.select("svg"),
    width = +svg.attr("width"),
    height = +svg.attr("height");
​
var formatNumber = d3.format(",.2f"),
    format = function(d) { return formatNumber(d) + " PJ"; },
    color = d3.scaleOrdinal(d3.schemeCategory10);
​
var sankey = d3.sankey()
    .nodeWidth(36)
    .nodePadding(15)
        .nodeAlign(d3.sankeyCenter)
        .iterations(30)
    .extent([[1, 1], [width - 1, height - 6]]);
​
var link = svg.append("g")
    .attr("class", "links")
    .attr("fill", "none")
    .attr("stroke", "#000")
    .attr("stroke-opacity", 0.2)
  .selectAll("path");
​
var node = svg.append("g")
    .attr("class", "nodes")
    .attr("font-family", "sans-serif")
    .attr("font-size", 10)
  .selectAll("g");
​
d3.json("sankey.json", function(error, energy) {
  if (error) throw error;
​
  sankey(energy);
​
  link = link
    .data(energy.links)
    .enter().append("path")
      .attr("d", d3.sankeyLinkHorizontal())
      .attr("stroke-width", function(d) { return Math.max(1, d.width); })
        .style("stroke", (d) => color(d.group))
​
  link.append("title")
      .text(function(d) { return d.source.name + " → " + d.target.name + "\n" + format(d.value); });
​
  node = node
    .data(energy.nodes)
    .enter().append("g");
​
  node.append("rect")
      .attr("x", function(d) { return d.x0; })
      .attr("y", function(d) { return d.y0; })
      .attr("height", function(d) { return d.y1 - d.y0; })
      .attr("width", function(d) { return d.x1 - d.x0; })
      .style("fill", (d) => color(d.group))
      //.attr("stroke", "#000");
​
  node.append("text")
      .attr("x", function(d) { return d.x0 - 6; })
      .attr("y", function(d) { return (d.y1 + d.y0) / 2; })
      .attr("dy", "0.35em")
      .attr("text-anchor", "end")
      .text(function(d) { return d.name + ' ' + formatNumber(d.value); })
    .filter(function(d) { return d.x0 < width / 2; })
      .attr("x", function(d) { return d.x1 + 6; })
      .attr("text-anchor", "start");
​
  node.append("title")
      .text(function(d) { return d.name + "\n" + format(d.value); });
});
​
</script>
    