JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://d3js.org/d3.v3.min.js"></script>

CSS

body {
  font: 10px sans-serif;
}

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

.bar {
  fill: steelblue;
}

.x.axis path {
  display: none;
}

.legend line {
  stroke: #000;
  shape-rendering: crispEdges;
}

JavaScript

var data = [
    {
        "episode": "Ep. 01",
        "yes": "60",
        "no": "40"
    },
    {
        "episode": "Ep. 02",
        "yes": "70",
        "no": "30"
    },
    {
        "episode": "Ep. 03",
        "yes": "50",
        "no": "50"
    },
    {
        "episode": "Ep. 04",
        "yes": "90",
        "no": "10"
    },
    {
        "episode": "Ep. 05",
        "yes": "30",
        "no": "70"
    },
    {
        "episode": "Ep. 06",
        "yes": "60",
        "no": "40"
    },
    {
        "episode": "Ep. 07",
        "yes": "70",
        "no": "30"
    },
    {
        "episode": "Ep. 08",
        "yes": "50",
        "no": "50"
    },
    {
        "episode": "Ep. 09",
        "yes": "90",
        "no": "10"
    },
    {
        "episode": "Ep. 10",
        "yes": "30",
        "no": "70"
    }
];

var margin = {top: 20, right: 100, bottom: 30, left: 40},
    width = 600 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var x = d3.scale.ordinal()
    .rangeRoundBands([0, width], .1);

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

var color = d3.scale.ordinal()
    .range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]);

var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom");

var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .tickFormat(d3.format(".0%"));

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 + ")");

//d3.csv("data.csv", function(error, data) {
  color.domain(d3.keys(data[0]).filter(function(key) { return key !== "episode"; }));

  data.forEach(function(d) {
    var y0 = 0;
    d.ages = color.domain().map(function(name) { return {name: name, y0: y0, y1: y0 += +d[name]}; });
    d.ages.forEach(function(d) { d.y0 /= y0; d.y1 /= y0; });
  });

 ...