test bar chart

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

<body>
  <script>
   	var numbers = [1,5,3,9,15];
    
    margin = {top: 20, right: 30, bottom: 30, left: 30};
    
    var windowWidth = 1000 - margin.right - margin.left;
    var windowHeight = 600 - margin.top - margin.bottom;
    
    var svg = d3.select("body").append("svg")
    	.attr({width: 1000, height: 600})
    
    var g = svg.select("body").append("g")
    	.attr( {
        width: windowWidth,
        height: windowHeight
      })
    
    // map
    var bars = svg.selectAll("bars").data(numbers);
    
    //create visual elements
    var barEntering = bars.enter().append("rect")
    
    //assign attributes
    bars.attr({
      	x: function(d,i) {return i*50},
      	y: function(d,i) {return 300 - d*10},
      	width: 30,
      	height: function(d,i) {return d*10},
      	fill: "#00060e"
      
      
     // exit statements 
    })
   
  </script>
</body>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.js