D3 Examples - Greenhouse gases emissions

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Module 3 exercice</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
            
            <style type="text/css">
            
            body {
                background-color: #EDEDED;
            }
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            h {
                font-size: 24px;
                margin: 2;
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            }
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            p {
                font-size: 13px;
                font-family: arial;
                margin: 15px 0 0 0;
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            }
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            svg {
                background-color: #EDEDED;
            }
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            rect:hover {
                fill: #635C5C;
            }
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            .axis path,
            .axis line {
                fill: none;
                stroke: black;
                shape-rendering: crispEdges;
 
            }
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            .axis text {
                font-family: arial;
                font-size: 10px;
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            }
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            .y.axis path,
            .y.axis line {
                 opacity: 0;
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            }
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        </style>
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    </head>
    <body>
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<h1>Who is the world's biggest emitter of GHG in 2012?<h1/>
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    <p>Here is a list of countries ranked by greenhouse gases emissions (GHG) per capita (kilograms, thousands), based on <a href="https://stats.oecd.org/">OECD data.<a/></p>
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<script type="text/javascript">
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var w = 800;
var h = 500;
var padding = [1, 10, 30, 95 ]; //top - 0, right - 1, bottom - 2, left - 3
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var widthScale = d3.scale.linear()
                         .range([  0, w - padding[1] - padding[3] ]);
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var heightScale = d3.scale.ordinal()
                    .rangeRoundBands( [ padding[0], h - padding[2] ], 0.2);
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var xAxis = d3.svg.axis()
                 .scale(widthScale)
                 .orient("bottom");                                             
var yAxis = d3.svg.axis()
                 .scale(heightScale)
                 .orient("left"); 
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var svg = d3.select("body")
                        .append("svg")
                        .attr("width", w)
                        .attr("height", h);
      
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      d3.csv("melaniejuliendata.csv", function(data) {
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        data.sort(function(a, b) {
        return d3.descending(+a.GHGin2012, 
            +b.GHGin2012);
        });
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        widthScale.domain( [ 0, d3.max(data, function(d) {
        return +d.GHGin2012;
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         }) ]);
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        heightScale.domain(data.map(function(d) {return d.Country; } ));
      
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     var rects = svg.selectAll("rect")
                    .data(data)
                    .enter()
                    .append("rect");
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               rects.attr("x", padding[3])
                    .attr("y", function(d, i) {
                        return heightScale(d.Country);
                    })
                    .attr("width", function(d) {
                        return widthScale(d.GHGin2012);
                    })
                    .attr("height", heightScale.rangeBand())
                    .attr("fill", "#D11919")
                    .append("title")
                    .text(function(d) {
                        return d.Country + "'s total GHG emissions in 2012 is " + d.GHGin2012 +" kg per capita (thousands)";
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            });
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                svg.append("g")
                   .attr("class", "x axis")
                   .attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
                   .call(xAxis);
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                svg.append("g")
                    .attr("class", "y axis")
                    .attr("transform", "translate(" + (padding[3] - 5) + ",0)")
                    .call(yAxis);
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​
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                    });
      
        </script>
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    </body>
</html>
    