D3 Examples - just practice....

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<html>
  <head>
    <title> D3 Test </title>
    <script src="https://d3js.org/d3.v3.min.js"></script>
  </head>
  <body>
    test circle </br>
    <svg width="100" height="100">
      <circle cx="50" cy="50" r="47" fill="blue" stroke="gray" stroke-width="2"/>
    </svg> </br></br></br>
    <script type="text/javascript"> 
        var dataset = [ 5, 10, 15, 20, 25 ];
    //d3.select("body").selectAll("p").data(dataset).enter().append("p").text("New paragraph!");
    d3.select("body").selectAll("p").data(dataset).enter().append("p").text(function(d) {return d;}).style("color", function(d) {
        if(d>15) {
            return "red";
        } else {
            return "black";
        }
    });
    </script>
  </body>
</html>
    