A flexible D3 Bar Chart (v4) with variant amounts of data and svg radial buttons

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<!DOCTYPE html>
<html style="height:100%" >
​
<head>
  <script src="https://d3js.org/d3.v4.min.js"></script>
</head>
​
<body id="body" style="height:100%; width:100%"  onload="loadData()" onresize="visualizeData();">
  <div id="d3-visualization-contianer">
    <svg style="border:1px lightgray solid;" />
  </div>
​
​
  <script src="bar-chart.js" type="text/JavaScript"></script>
</body>
</html>
​
    

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