Reusable bar graph (with d3Kit)

This is a simple bar graph written using d3.js v4.

forked from d3noob's block: Simple bar graph in v4

forked from kristw's block: Simple bar graph in v4 (with d3Kit)

<!DOCTYPE html>
<meta charset="utf-8">
<style> /* set the CSS */

.chart { display: inline-block; vertical-align: top; }
.bar { fill: steelblue; }

</style>
<body>
  <div class="chart" id="chart1"></div>
  <div class="chart" id="chart2"></div>
	
    	
<script src="//d3js.org/d3.v4.min.js"></script>
<script src="https://unpkg.com/babel-core@5.8.38/browser.min.js"></script>
<script src="https://cdn.jsdelivr.net/gh/twitter/d3kit/dist/d3kit.min.js"></script>
<script type="text/babel">

class BarChart extends d3Kit.SvgChart {
  static getDefaultOptions() {
    return d3Kit.helper.deepExtend(
      super.getDefaultOptions(),
      {
        margin: {top: 20, right: 20, bottom: 30, left: 40},
        initialWidth: 480,
        initialHeight: 500,
      }
    );
  }

constructor(selector, options) {
    super(selector, options);

this.x = d3.scaleBand()
          .padding(0.1);
		this.y = d3.scaleLinear();
    
    this.xAxis = this.rootG.append("g");
    this.yAxis = this.rootG.append("g");
    
    this.visualize = this.visualize.bind(this);
    this.on('data', this.visualize);
  }
  
  visualize() {
		this.x.range([0, this.getInnerWidth()])
    this.y.range([this.getInnerHeight(), 0]);

const data = this.data();

if(data) {
      // Scale the range of the data in the domains
      this.x.domain(data.map(d => d.salesperson));
      this.y.domain([0, d3.max(data, d => d.sales)]);

const selection = this.rootG.selectAll(".bar")
        .data(data)

// append the rectangles for the bar chart
    const sEnter = selection.enter().append("rect")
        .attr("class", "bar")

// to make this component really reusable, we have to also update 
    selection.merge(sEnter)
        .attr("x", d => this.x(d.salesperson))
        .attr("width", this.x.bandwidth())
        .attr("y", d => this.y(d.sales))
        .attr("height", d => this.getInnerHeight() - this.y(d.sales));
     
    // and exit  
    selection.exit().remove();
    
    // draw the x Axis
		this.xAxis
        .attr("transform", "translate(0," + this.getInnerHeight() + ")")
        .call(d3.axisBottom(this.x));

// draw the y Axis
		this.yAxis
        .call(d3.axisLeft(this.y));    
    }
    
  }
}
  
const chart1 = new BarChart('#chart1')
// 	.width(300); 
const chart2 = new BarChart('#chart2', {
  margin: {top: 20, right: 20, bottom: 30, left: 40},
  initialWidth: 240,
  initialHeight: 250,
}); 
  
// get the data
d3.csv("sales.csv", function(error, data) {
  if (error) throw error;

// format the data
  data.forEach(function(d) {
    d.sales = +d.sales;
  });

chart1.data(data);
	chart2.data(data);
});

</script>
</body>

Updated missing url https://rawgit.com/twitter/d3kit/master/dist/d3kit.min.js to https://cdn.jsdelivr.net/gh/twitter/d3kit/dist/d3kit.min.js

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

https://unpkg.com/babel-core@5.8.38/browser.min.js

https://rawgit.com/twitter/d3kit/master/dist/d3kit.min.js