Horizontal Bar Chart

Part of the video course: D3.js in Motion.

This horizontal bar chart shows the top 20 countries with the most Internet users.

The data shown here comes from Internet Top 20 Countries - Internet Users 2017 - Internet World Stats.

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <title>Top Internet Countries Visualization</title>
    <style>
      body {
        margin: 0px;
      }
      .domain {
        display: none;
      }
      .tick line {
        stroke: #C0C0BB;
      }
      .tick text {
        fill: #8E8883;
        font-size: 14pt;
        font-family: sans-serif;
      }
      .axis-label {
        fill: #635F5D;
        font-size: 32pt;
        font-family: sans-serif;
      }
    </style>
  </head>
  <body>
    <svg width="960" height="500"></svg>
    <script>

const xValue = d => d.netUsers;
      const xLabel = 'Internet Users';
      const yValue = d => d.country;
      const yLabel = 'Country';
      const margin = { left: 150, right: 30, top: 5, bottom: 75 };

const svg = d3.select('svg');
      const width = svg.attr('width');
      const height = svg.attr('height');
      const innerWidth = width - margin.left - margin.right;
      const innerHeight = height - margin.top - margin.bottom;

xAxisG.append('text')
          .attr('class', 'axis-label')
          .attr('x', innerWidth / 2)
          .attr('y', 55)
          .text(xLabel);

const xScale = d3.scaleLinear();
      const yScale = d3.scaleBand()
        .paddingInner(0.3)
        .paddingOuter(0);

const xTicks = 10;
      const xAxis = d3.axisBottom()
        .scale(xScale)
        .ticks(xTicks)
        .tickPadding(5)
        .tickFormat(d3.format('.0s'))
        .tickSize(-innerHeight);

const yAxis = d3.axisLeft()
        .scale(yScale)
        .tickPadding(5)
        .tickSize(-innerWidth);

const row = d => {
        const netUsersWithCommas = d['Internet Users 31 Mar 2017'];
        return {
          country: d['Country or Region'],
          netUsers: +netUsersWithCommas.replace(/,/g, '')
        };
      };

d3.csv('data.csv', row, data => {
        yScale
          .domain(data.map(yValue).reverse())
          .range([innerHeight, 0]);

xScale
          .domain([0, d3.max(data, xValue)])
          .range([0, innerWidth])
          .nice(xTicks);

g.selectAll('rect').data(data)
          .enter().append('rect')
            .attr('x', 0)
            .attr('y', d => yScale(yValue(d)))
            .attr('width', d => xScale(xValue(d)))
            .attr('height', d => yScale.bandwidth())
            .attr('fill', 'steelblue');

xAxisG.call(xAxis);

yAxisG.call(yAxis);
        yAxisG.selectAll('.tick line').remove();
      });
    </script>
  </body>
</html>

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