USA 2012 presidential election (d3v3) by almccon

index.html

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
  <script src="//d3js.org/topojson.v1.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg { width:100%; height: 100% }
  </style>
</head>

<body>
  <script>
    var width = 1000,
        height = 800;
    //var projection = d3.geo.albersUsa() // Did you know, it's actually the default projection for d3.geo.path?!
    //  .scale(500)
    //  .translate([width / 2, height / 2]);
    
    var color = d3.scale.linear()
        .domain([20,50,80])
        .range(['blue','purple','red']);
    
    var svg = d3.select("body").append("svg")

    d3.json("elpo12p010g.topojson", function(error, usa2016) {
      if (error) return console.error(error);
      var counties = topojson.feature(usa2016, usa2016.objects.elpo12p010g).features;

      var countyPaths = svg.selectAll("path")
      		.data(counties)
      	.enter().append("path")
      		.attr("d", d3.geo.path())
      		.style("fill", function(d) { return color(+d.properties.PCT_ROM);});
 		
    });
  </script>
</body>