D3 Examples - square-to-hexagon-transition

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<!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>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 960)
      .attr("height", 500)
​
    svg.append("path")
      .attr("fill", "none")
        .attr("stroke", "#f0f")
        .attr("stroke-width", 10)
        .attr("d", "M100 100 H 400 V 400 H 100 L 100 100Z")
//      .transition()
//          .duration(5000)
//          .attr("d", "M200,200L600,450L50,400L500,200Z"); 
​
  </script>
</body>
​
    