D3 Examples - bar chart

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<!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; }
    svg {
        font: 10px sans-serif;
    }
​
    path.line {
      fill: none;
      stroke: #666;
      stroke-width: 1.5px;
    }
​
    path.area {
      fill: #e7e7e7;
    }
​
    .axis {
      shape-rendering: crispEdges;
    }
​
    .x.axis line {
      stroke: #fff;
    }
​
    .x.axis .minor {
      stroke-opacity: .5;
    }
​
    .x.axis path {
      display: none;
    }
​
    .y.axis line,
    .y.axis path {
      fill: none;
      stroke: #000;
    }
  </style>
</head>
​
<body>
  <script>
        
    var data = [{color: "#85C1E9", value: 1},{color: "#3498DB", value: 2},{color: "#2874A6", value: 3},{color: "#2874A6", value: 4},{color: "#1B4F72", value: 5},]
                  
    var margin = {top:20, right:60, bottom: 30, left:60}
    
    var width = 960 - margin.left - margin.right;
    var height = 500 - margin.top - margin.bottom;
    
    var svg = d3.select("body").append("svg")
      .attr({
        width: width + margin.left + margin.right,
        height: height + margin.top + margin.bottom
      })
        .style("background-color", "#fafafa")
    
    var g = svg.append("g")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
​
    //Scales
    
    var y_scale = d3.scale.linear()
        .domain([0,(d3.max(data.map(function(d) { return d.value; })))])
        .range([height,100])
    
    var x_scale = d3.scale.ordinal()
        .domain(data.map(function(d) { return d.value; }))
        .rangeRoundBands([0, width], 0.4, 0.4);
    
    var bars = g.selectAll('rect').data(data)
        
    bars.enter().append('rect')
    
    .attr({
      x: function(d, i) { return x_scale(d.value)},
      y: function(d, i) { return y_scale(d.value);}, 
      width: x_scale.rangeBand(),
      height: function(d, i) { return height - y_scale(d.value); }, 
    })
    
    .style("fill", function(d, i) { return d.color; });
    
    bars.exit().remove();
    
    //Axis
    
    var xAxis = d3.svg.axis()
                                .scale(x_scale)
                                .orient("bottom")
    
        var yAxis = d3.svg.axis()
                                .scale(y_scale)
                                .orient("left")
    
    g.append("g")
        .attr("class", "x axis")
        .attr("transform", "translate(0," + height + ")")
        .call(xAxis)
    
    g.append("g")
        .attr("class", "y axis")
        .call(yAxis)
        //.attr("transform", "translate(" + width + ", 0)")
​
  </script>
</body>
​
    