D3 Examples - EU renewable energy

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Renewable consumption in the European Union</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
        <style type="text/css">
            
            body {
                background-color: white;
            }
            h1 { 
                font-size: 30px;
                font-family: helvetica;
            }
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            h2 { 
                font-size: 20px;
                font-family: helvetica;
            }
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            svg {
                background-color: white;
            }
​
            rect {
                fill: #006600;
            }
            rect:hover {
                opacity: 0.67;
            }
​
​
        </style>
    </head>
    <body>
        <h1>Which EU country used the most renewable energy?</h1>
        <h2>In percentage, for 2013</h2>
        <script type="text/javascript">     
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            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", 1000)
                        .attr("height", 450);
​
​
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            d3.csv("Lesson3GreenEnergy.csv", function(data) {
​
                data.sort(function(a, b) {
                    return d3.descending(+a.Renewable_energy_consumption, +b.Renewable_energy_consumption);
​
                    //If your numeric values aren't sorting properly,
                    //try commenting out the line above, and instead using:
                    //
                    //return d3.descending(+a.lifeSatisfaction, +b.lifeSatisfaction);
                    //
                    //Data coming in from the CSV is saved as strings (text),
                    //so the + signs here force JavaScript to treat those
                    //strings instead as numeric values, thereby fixing the
                    //sort order (hopefully!).
                });
​
                var rects = svg.selectAll("rect")
                                .data(data)
                                .enter()
                                .append("rect");
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                rects.attr("x", 0)
                    .attr("y", function(d, i) {
                        return i * 15;
                    })
                    .attr("width", function(d) {
                        return d.Renewable_energy_consumption * 10;
                    })
                    .attr("height", 12)
                    .append("title")
                    .text(function(d) {
                        return d.Country + " consumed "+ d.Renewable_energy_consumption + " percent of renewable energy in total in 2013.";
                    });
​
            });
​
​
        </script>
            <p>Source: Eurostat</p>
    </body>
</html>
    