Sankey Viz using R2D3

<!DOCTYPE html>
<meta http-equiv="X-UA-Compatible" content="IE=8" charset="utf-8">
<title>Sankey Diagram</title>

@import url(style.css);

#chart {
  height: 900px;
}

.node rect {
  cursor: move;
  fill-opacity: .9;
  shape-rendering: crispEdges;
}

.node text {
  pointer-events: none;
  fill: #fff;
}

.link {
  fill: none;
  stroke: #fff;
  stroke-opacity: .2;
}

g.node {
	color: #fff;
}

.link:hover {
  stroke-opacity: .7;
}

</style>
<script src="es5-shim.min.js" type="text/javascript"></script>
<script src="jquery.min.js" type="text/javascript"></script>
<script type="text/javascript" src="sizzle.js"></script> 
<script type="text/javascript" src="compat.js"></script> 
<script type="text/javascript" src="../../../r2d3-master/r2d3.v2.js"></script>
<script src="sankey.js"></script>
</head>
<body>

var margin = {top: 1, right: 1, bottom: 6, left: 1},
    width = 960 - margin.left - margin.right,
    height = 900 - margin.top - margin.bottom;

var formatNumber = d3.format(",.0f"),
    format = function(d) { return formatNumber(d) + " TWh"; },
    color = d3.scale.category20();

var svg = d3.select("#chart").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var sankey = d3.sankey()
    .nodeWidth(15)
    .nodePadding(10)
    .size([width, height]);

var path = sankey.link();

d3.json("energy.json", function(energy) {

sankey
      .nodes(energy.nodes)
      .links(energy.links)
      .layout(32);

var link = svg.append("g").selectAll(".link")
      .data(energy.links)
    .enter().append("path")
      .attr("class", "link")
      .attr("d", path)
      .style("stroke-width", function(d) { return Math.max(1, d.dy); })
      .sort(function(a, b) { return b.dy - a.dy; });

// link.append("title")
 //     .text(function(d) { return d.source.name + " → " + d.target.name + "\n" + format(d.value); });

node.append("rect")
      .attr("height", function(d) { return d.dy; })
      .attr("width", sankey.nodeWidth())
      .style("fill", function(d) { return d.color = color(d.name.replace(/ .*/, "")); })
      .style("stroke", function(d) { return d3.rgb(d.color).darker(2); })
    ;//.append("title")
     // .text(function(d) { return d.name + "\n" + format(d.value); });

node.append("text")
      .attr("x", -6)
      .attr("y", function(d) { return d.dy / 2; })
      .attr("dy", ".35em")
      .attr("text-anchor", "end")
      .attr("transform", null)
      .text(function(d) { return d.name; })
    .filter(function(d) { return d.x < width / 2; })
      .attr("x", 6 + sankey.nodeWidth())
      .attr("text-anchor", "start");

function dragmove(d) {
    d3.select(this).attr("transform", "translate(" + d.x + "," + (d.y = Math.max(0, Math.min(height - d.dy, d3.event.y))) + ")");
    sankey.relayout();
    link.attr("d", path);
  }
});

</script>