D3 Examples - Bar Chart

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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>
  <svg width="900" height="600">
    <circle cx="100" cy="200" r="10" style="fill:red"></circle>
    <rect x="200" y="200" width="40" height="60" style="stroke: blue; fill:none"></rect>
    <rect x="250" y="160" width="40" height="100"></rect>
    <rect x="300" y="230" width="40" height="30"></rect>
  </svg>
  <script>
    d3.selectAll("rect")
        .style("fill", "green")
    d3.append("rect").att</script>
</body>
​
    