D3 Examples - 7.5 animated bar chart

xxxxxxxxxx
 
<!DOCTYPE html>
<meta charset="utf-8">
<html>
<head>
​
<!-- 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"></script>
​
<!-- Creating the headlines -->
<p id="h1">ANIMATION | INDEX</p>
<div id="link"> by
<a href="https://slides.com/sandravizmad">SANDRA</a> | <a href="https://data.oecd.org/biodiver/threatened-species.htm">DATA</a></div>
​
<style>
​
/*Defining text stylings*/
​
#h1 {
  font-size:30px;
  margin:30px 0px 0px 20px;
  color:#f5fa91;
  font-family:'Montserrat Alternates', sans-serif;
  font-weight:300;
}
​
#link {
    font-family:'Montserrat Alternates', sans-serif;
  font-weight:200;
  font-size:10px;
    margin:5px 0px 0px 22px;
  color:white;
}
​
a:link, a:visited, a:active {
    text-decoration: none;
  color:white;
  border-bottom:1.5px dotted white;
}
​
body {
  background-color:#011227;
}
​
/*Defining axis stylings*/
​
.y-axis text, .x-axis text {
  font-family:'Montserrat Alternates', sans-serif;
  font-weight:400;
  font-size:10px;
  opacity:1;
  fill:white;
}
​
.y-axis path {
  fill:none;
  stroke-width:0;
  stroke-opacity:1;
  stroke:white;
}
​
.x-axis path {
  fill:none;
  stroke-width:0;
  stroke-opacity:1;
  stroke:white;
}
​
.y-axis line, .x-axis line {
  fill:none;
  stroke-width:0;
  stroke-opacity:1;
  stroke:white;
  stroke-dasharray:2;
}
​
</style>
</head>
​
<body>
<script>
​
//Margin conventions
var m = {top:100, right:50, bottom:50, left:50}
    w = 600 - m.left - m.right,
    h = 600 - 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/5111d716d68cb2fbea3b3867d6ba8a91/raw/0872f44fdfa7f9b6dc644ee3c47dfc5f7f56dc07/OECD%2520Threatened%2520species%2520by%2520country%25202015',
  prepare,
  data => {
​
  //Check
  console.log(data);
​
  //Sort data by value
  data.sort((b, a) => {return a.Value - b.Value;});
​
  //X scale
  var x = d3.scaleBand()
        .domain(data.map(d => d.LOCATION))
        .rangeRound([0, w])
        .paddingInner(0.1);
​
  //Y scale
  var y = d3.scaleLinear()
        .domain([0, d3.max(data, d => d.Value)])
        .range([h, 0]);
​
  //Color scale
  var c = d3.scaleLinear()
      .domain(d3.extent(data, d => d.Value))
      .range(["#8ff798", "#85f6fa"]);
​
  //X axis
  svg.append("g")
     .attr("class", "x-axis")
     .attr("transform", `translate(0, ${h})`)
     .call(d3.axisBottom()
               .scale(x)
                 .ticks(3)
                         .tickSize(-h)
               .tickPadding(0))
     .selectAll("text")
     .attr("y", 6)
     .attr("x", 0)
     .attr("transform", "rotate(35)")
     .style("text-anchor", "start");
​
  //Y axis
  svg.append("g")
     .attr("class", "y-axis")
     .attr("transform",`translate(0, ${0})`)
     .call(d3.axisLeft()
               .scale(y)
                 .ticks(5)
               .tickSize(-w)
                         .tickPadding(0));
​
  //Draw the bars
  svg.selectAll('rect')
     .data(data)
     .enter()
     .append('rect')
     .attr('class', 'bar')
     .attr("fill", d => c(d.Value))
     .attr("x", d => x(d.LOCATION))
     .attr("width", x.bandwidth())
     .attr("y", d => h)
     .attr("height", 0)
     .transition()
     .duration(400)
     .delay((d, i) => i*200)
     .attr("y", d => y(d.Value))
     .attr("height", d => h - y(d.Value));
});
​
//Make sure all variables are numbers
function prepare (d) {
  d.Value = +d.Value;
  return d;
}
​
</script>
</body>
</html>
​
    