TransitGym.github.io/animatetest.html at master · TransitGym/TransitGym.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
	<meta charset="UTF-8">
	<meta name="viewport" content=
	"width=device-width, initial-scale=1.0">
  <svg width='500' height='500'>
  </svg>
</head>

<body>
	<!-- Fetching from CDN of D3.js -->
	<script type="text/javascript"
		src="https://d3js.org/d3.v4.min.js">
	</script>

	<script>
  const svg = d3.select('svg')
  var legend_keys = ["Austin", "New York", "San Francisco"]

var lineLegend = svg.selectAll(".lineLegend").data(legend_keys)
    .enter().append("g")
    .attr("class","lineLegend")
    .attr("transform", function (d,i) {
            return "translate(" + width + "," + (i*20)+")";
        });

lineLegend.append("text").text(function (d) {return d;})
    .attr("transform", "translate(15,9)"); //align texts with boxes

lineLegend.append("rect")
    .attr("fill", function (d, i) {return color_scale(d); })
    .attr("width", 10).attr("height", 10);
	</script>
</body>

</html>