D3 Examples - Bar chart with x and y axis

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<!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; }
    svg {
      width: 100%;
      height: 100%;
    }
  </style>
</head>
​
<body>
  <svg></svg>
  <script>  
    var city = 'New York';
    var margin = {top: 20, bottom: 20, left: 40, right: 20};
    var width = 800 - margin.left - margin.right;
    var height = 400 - margin.top - margin.bottom;
​
    
    var svg = d3.select('svg')
        .attr('width', width + margin.left + margin.right)
        .attr('height', height + margin.top + margin.bottom);
    
    var chart = svg.append('g')
        .attr('transform', 'translate (' + margin.left + ',' + margin.top + ')')
    
    // dataset of city temperatures across time
    d3.tsv('data.tsv', (err, data) => {
      // clean the data
      data.forEach(d => {
        d.date = d3.timeParse("%Y%m%d")(d.date);
        d.date = new Date(d.date); // x
        d[city] = ++d[city]; // y
      });
    
     console.log(data[0]);
     var xScale = d3.scaleTime()
        .domain(d3.extent(data, function(d) { return    d.date;}))
      .range([0, width]);
      
     var xAxis = d3.axisBottom()
        .scale(xScale);
      
     chart.append('g')
        .attr('transform', 'translate (' + 0 + ',' + height + ')')
        .call(xAxis);
     
     var yScale = d3.scaleLinear()
        .domain(d3.extent(data, function(d) { return d[city]}))
     .range([height, 0]);
      
     var yAxis = d3.axisLeft()
        .scale(yScale);
      
     chart.append('g')
     .call(yAxis);
      
      var rectWidth = 3;
      
      var rects = svg.selectAll('rect')
        .data(data)
        .enter()
        .append('rect')
        .attr('x', function(d, i) { return xScale(d.date)  + (margin.left) })
        .attr('y', function(d) { return yScale(d[city]) + (margin.top)})
        .attr('width', rectWidth)
        .attr('height', function(d) { return height - yScale(d[city])})
        .attr('fill', 'blue')
        .attr('stroke', 'white')
        .on('click', function(d) {
          console.log(d[city])
        });
      
      debugger;
    });
  </script>
</body>
​
    