D3 Examples - 4.1 bar chart

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<!DOCTYPE html>
<meta charset="utf-8">
<html>
<head>
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<!-- Google fonts reference-->
<link href="https://fonts.googleapis.com/css2?family=Montserrat+Alternates:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&family=Montserrat:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&family=Roboto:ital,wght@0,100;0,300;1,100;1,300&display=swap" rel="stylesheet">
​
<!-- Connecting with D3 library-->
<script src="https://d3js.org/d3.v4.min.js" charset="utf-8"></script>
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<style>
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/*Defining text stylings*/
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#h1 {
  font-size:30px;
  margin:30px 0px 0px 20px;
  color:#f5fa91;
  font-family:'Montserrat Alternates', sans-serif;
  font-weight:300;
}
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#link {
    font-family:'Montserrat Alternates', sans-serif;
  font-weight:200;
  font-size:10px;
    margin:5px 0px 0px 22px;
  color:white;
}
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a:link, a:visited, a:active {
    text-decoration: none;
  color:white;
  border-bottom:1.5px dotted white;
}
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body {
  background-color:#011227;
}
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/*Defining chart stylings*/
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rect {
  fill:#85f6fa;
  opacity:0.8;
}
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text {
  font-family:'Montserrat Alternates', sans-serif;
  font-size:9px;
  font-variant: small-caps slashed-zero;
    fill:#f5fa91;
}
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</style>
</head>
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<body>
  
<!-- Creating the headlines -->
<p id="h1">BAR CHART | INDEX </p>
<div id="link">by
<a href="https://slides.com/sandravizmad">SANDRA</a></div>  
  
<script>
​
//Margin conventions
var m = {top:100, right:50, bottom:50, left:40}
    w = 700 - m.left - m.right,
    h = 700 - m.top - m.bottom;
​
//Container
var svg = d3.select("body")
    .append("svg")
    .attr("width", w + m.left + m.right)
    .attr("height", h + m.top + m.bottom)
    .append("g")
        .attr("transform", `translate(${m.left}, ${m.top})`);
​
//Data loading
d3.csv(
  "https://gist.githubusercontent.com/sandravizz/22191c2a376a41df870994faf6eab6eb/raw/dfcf4a93505254832e37f66e3328ff6e740908b0/OECD%2520Threatened%2520species:%2520plants%2520by%2520country%25202015",
  prepare,
  data => {
​
  //Sort data by value
  data.sort((b, a) => a.Value - b.Value);
​
  //Y scale
  var y = d3.scaleLinear()
      .domain([0, d3.max(data, d => d.Value)])
      .range([h, 0]);
​
  //X scale
  var x = d3.scaleBand()
      .domain(d3.range(data.length))
      .rangeRound([0, w])
      .paddingInner(0.05);
​
  //Draw the bars
  svg.selectAll('rect')
      .data(data)
      .enter()
      .append('rect')
      .attr("x",(d, i) => x(i))
      .attr("width", x.bandwidth())
      .attr("y",d => y(d.Value))
      .attr("height", d => h - y(d.Value));
​
  //Creating the lables
  svg.selectAll("text")
        .data(data)
        .enter()
        .append("text")
        .text(d => d.LOCATION)
        .attr("x", (d, i) => x(i) + 3)
        .attr("y", h - 8);
});
​
//Make sure all variables are numbers
function prepare (d) {
  d.Value = +d.Value;
  return d;
}
​
</script>
</body>
</html>
​
    