Gene Map

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

<body>
  <script>
   
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)

d3.json("data.json", function(err, mydata){
     var g = d3.select("svg").selectAll("g")
     	.data(mydata)
     	.enter()
			.append("g")
     .attr("transform", function (d) {if (d.orientation === 'forward') {return "translate(" + -(d.stop-d.start) + ",100)";} else {return "translate(" + 960 + ",125)";}});
    	g.transition()
     	.duration(1000)
      .delay ( function (d) {return d.start})
      .attr("transform", function (d) {if (d.orientation === 'forward') {return "translate(" + d.start + ",100)";} else {return "translate(" + d.start + ",125)";}});
      
    g.append("rect")
     	.attr("height",50)
   		.attr("width", function (d) {return d.stop-d.start;})
     	.attr("fill", function (d) {
       if (d.orientation == "forward") {return "green";}
     
       else if (d.orientation == "reverse"){return "blue"}})
     	.style("stroke", "black")
      
      .style("stroke-width", 5)
   
    g.append("text")
     .attr("y", 25)
     .attr("x", function (d) {return (d.stop-d.start)/2})
     .text(function (d) {return "Gene " + d.name})
    	.attr ("text-anchor", "middle")
    .attr("alignment-baseline", "central")
    
   })

</script>
</body>

https://d3js.org/d3.v4.min.js