Bar Chart

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

<body>
  <script>
    var data =  [1,2,3,4,5,6]
    var colors = ['#e74c3c', '#f1c40f', '#2ecc71','#2ecc71','#2ecc71'];
    var othercolors = d3.scale.category10()
    
    var alldata = [{x: "A", y:100, colors: "red"}, {x: "B", y:200, colors: "green"}]
    
    var margin={top: 20, bottom: 20, left: 50, right: 20};
    var svgHeight=400;
    var svgWidth=800; 
    var chartHeight=svgHeight-margin.top-margin.bottom; 
    var chartWidth=svgWidth-margin.left-margin.right; 
    
    var svg = d3.select("body").append("svg")
    	.attr({
        width:svgWidth,
        height:svgHeight
      })

//scale
    var yScale = d3.scale.linear().domain([0,200]).range([chartHeight, 0]);
    var xScale = d3.scale.ordinal().domain(["A","B"]).rangeRoundBands([0,chartWidth], 0.2, 0.2);
    
    //axis
    var xAxis = d3.svg.axis().orient("bottom").scale(xScale); 
    var yAxis = d3.svg.axis().orient("left").scale(yScale);
    
    var chartGroup = svg.append("g")
    .attr("class", "chartArea")
    .attr("transform", "translate("+margin.left + "," + margin.top + ")");
    
    
    //x axis
    chartGroup.append("g")
    	.attr("class", "x axis")
    .attr("transform", "translate(0, "+ chartHeight + ")")
    .call(xAxis);
    
    //y axis
    chartGroup.append("g")
    	.attr("class", "y axis")
    .attr("transform", "translate(0, "+ 0 + ")")
    .call(yAxis);
 
    var bars = chartGroup.selectAll("rect").data(alldata);
    bars.enter().append("rect")
    	.attr({
      	x: function(d,i) {return xScale(d.x)},
        y: function(d,i){return yScale(d.y)},
        height: function(d,i) {return chartHeight - yScale(d.y)},
      	width: xScale.rangeBand()
    })
    .style("fill", function(d,i){ return othercolors(i)})
 
  </script>
</body>

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