Carrots & Pens

<!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)
		;
    
    var margin = {
      top: 20,
      bottom: 20,
      left: 20,
      right: 20
    }
    
    var data = [
      	{ name: "andrew", pens: 5, carrots: 50, phones: 1 }
      , { name: "avra", pens: 0, carrots: 25, phones: 1}
      , { name: "dana", pens: 3, carrots: 8, phones: 2}
      , { name: "elaine", pens: 8, carrots: 1, phones: 1}
      , { name: "kyle", pens: 20, carrots: 0, phones: 0}
      , { name: "megan", pens: 20, carrots: 22, phones: 8}
			, { name: "nam", pens: 20, carrots: 14, phones: 0}
      , { name: "naoya", pens: 15, carrots: 18, phones: 14}
      , { name: "patience", pens: 6, carrots: 3, phones: 89}
      , { name: "virginia", pens: 4, carrots: 18, phones: 2}
    ]
    
    var xScale = d3.scaleBand()
    	.domain(data.map(function(d){
        return d.name
      }))
    	.range([margin.left, 960-margin.left - margin.right])
    
    //console.log(xScale.domain(),xScale.range())
    
    
    var yExtent = d3.extent(data,function(d){return d.pens +d.carrots +d.phones
                                            })
    var yScale = d3.scaleLinear()
    	.domain(yExtent)
    	.range([margin.bottom, 500-margin.top-margin.bottom])
    
    //console.log(yExtent)
    
    var stack = d3.stack()
        .keys(["pens", "carrots", "phones"])
        .order(d3.stackOrderNone)
        .offset(d3.stackOffsetNone);
    
    //console.log(stack(data))
    
    var groups = svg.selectAll("g")
    	.data(stack(data))
 			.enter()
    	.append("g")

var rects = groups.selectAll("rect")
    	.data(function(d) {return d
                        })
    	.enter()
    	.append("rect")
    	.attr("x", function(d){ return xScale(d.data.name)
                            })
    	.attr("y", function(d) { return yScale(d[0])
      })
    	.attr("width", xScale.bandwidth())
    	.attr("height", function(d){ return yScale(d[1])
                                 })
    
    
    
    
  </script>
</body>

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