D3 Examples - Basic Bar Chart

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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%;
    }
    
    .bar {
      fill: blue;
      stroke: white
    }
    
    .path {
      fill: none;
      stroke: blue
    }
  </style>
</head>
​
<body>
  <svg></svg>
  <script>
    var city = 'New York';
    var width = 800;
    var height = 300;
    var margin = {top: 20, bottom: 20, left: 20, right: 20};
    
    
    //var width =  document.getElementsByTagName('svg').width;
    //var height = document.getElementsByTagName('svg').height;
    
    
    // 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
      });
      
      
      var yScale = d3.scaleLinear()
                            .domain(d3.extent(data, d => d[city]))
                            .range([height-margin.bottom,margin.top]).nice()
     
      /* Not used in d3.line */
      var heightScale = d3.scaleLinear()
                                        .domain(d3.extent(data, d => d[city]))
                                    .range([0,height-margin.bottom - margin.top])
      
      
      var xScale = d3.scaleTime()
                            .domain(d3.extent(data, d => d.date))
                            .range([margin.left,width - margin.left]).nice()
​
      
      var svg = d3.select('svg')
      
      
      
      /* Line definition    */
      var line = d3.line()
        .x( d=> xScale(d.date))
        .y( d=> yScale(d[city]))
        
      
      svg
        .append('path')
        .attr('d',line(data))
        .attr('fill','none')
        .attr('stroke','blue')
      
      /****  End Line     ****/
      
      
      
      
      /***  Rect definition   
      
      var rect = svg    
        .selectAll('rect')
        .data(data)
        .enter().append('rect')
        .attr('x', d => xScale(d.date) )
        .attr('y', d => yScale(d[city]) )
        //.attr('height', d =>  height - margin.bottom  - yScale(d[city]) )
        .attr('height', d =>  heightScale(d[city]) )
      
        .attr('width', 5)
        .attr('class','bar')
      
      /****  End rect     ****/
      
      var y_axis = d3.axisLeft()
      .scale(yScale)
                            
      var x_axis = d3.axisBottom()
      .scale(xScale)
      //.tickFormat(d3.timeFormat('%b %Y'))
                            
         
      svg.append('g')
        .attr("transform", "translate("+ [margin.left,0] + ")")
        .call(y_axis);
      
      
        svg.append('g')
        .attr("transform", "translate("+[0, height - margin.bottom ] +")")
        .call(x_axis)
      
  
      
      console.log(svg.nodes())
                            
      
      
                                
        
      
    });
  </script>
</body>
​
​
    