JSFiddle - React, Tailwind, and code Playground

by cesutherland

HTML

<script src="https://raw.github.com/documentcloud/underscore/1.4.4/underscore.js"></script>

CSS

body {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.layer-0 .bar {
  fill: steelblue;
}
.layer-1 .bar {
  fill: #306DA2;
}

.x.axis path {
  display: none;
}

JavaScript

function drawIt (data) {

  var margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = 450 - margin.left - margin.right,
    height = 320 - margin.top - margin.bottom,
    months = data[0].length,
    start = new Date(data[0][0].key),
    end = new Date(data[0][data[0].length - 1].key);
        
  var x = d3.time.scale()
    .domain([start, new Date(end).setUTCDate(end.getUTCDate() + 1)])
    .range([0, width - margin.left - margin.right])

  var y = d3.scale.linear()
    .range([height, 0]);

  var format = d3.time.format('%m');

  var xAxis = d3.svg.axis()
    .scale(x)
    .ticks(d3.time.months, 1)
    .tickFormat(function (d) {
      if (d.getUTCMonth() === 0) {
        return d.getUTCFullYear();
      } else {
        return format(d);
      }
    })
    .orient("bottom");

  var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")

  var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

  y.domain([0, d3.max(data, function(series) { return d3.max(series, function(d) { return d.value; }); })]);

  svg.append("g")
      .attr("class", "x axis")
      .attr("transform", "translate(" + margin.left + "," + height + ")")
      .call(xAxis);

  svg.append("g")
      .attr("class", "y axis")
      .call(yAxis)
    .append("text")
      .attr("transform", "rotate(-90)")
      .attr("y", 6)
      .attr("dy", ".71em")
      .style("text-anchor", "end")
      .text("Downloads");

  var layer = svg.selectAll(".layer")
    .data(data)
  .enter().append("g")
    .attr("class", function (d, i) {
        return 'layer layer-' + i;
    });

  layer.selectAll(".bar")
      .data(function (d) { return d; })
    .enter().append("rect")
      .attr("class", "bar")
      .attr("x", function(d) { return x(new Date(d.key)) - width / (months + 2) / 2 + margin.left; })
     ...