D3 Examples - Homelessness by state in the USA

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Adding Tooltips</title>
        <script type="text/javascript" src="https://d3js.org/d3.v3.js"></script>
        <style type="text/css">
            
            body {
                background-color: white;
                font-family: Arial;
            }
​
            svg {
                background-color: white;
            }
​
            rect {
                fill: rgb(60, 160, 180);
            }
            rect:hover {
                fill: rgb(30, 80, 100);
            }
​
            text {
                fill: black;
            }
​
        </style>
    </head>
    <body>
​
        <script type="text/javascript">     
            var row_height = 15;
            var chart_width = 800
​
            var svg = d3.select("body")
                        .append("svg")
                        .attr("width", chart_width)
                        .attr("height", 54*row_height);
​
            d3.csv("homeless_by_state_2014.csv", function(data) {
​
                data.sort(function(a, b) {
                    return d3.descending(+a.year_2014, +b.year_2014);
                });
​
                var rects = svg.selectAll("rect")
                                .data(data)
                                .enter()
                                .append("rect");
​
                rects.attr("x", 20)
                    .attr("y", function(d, i) {
                        return i * row_height;
                    })
                    .attr("width", function(d) {
                        return d.year_2014 * chart_width/120000;
                    })
                    .attr("height", row_height-2)
                    .append("title")
                    .text(function(d) {
                        return d.state + "'s 2014 homeless population was " + d.year_2014;
                    });
                var labels = svg.selectAll("text")
                        .data(data)
                        .enter()
                        .append("text");
                labels.attr("x", 0)
                        .attr("y", function(d, i) {
                            return i*row_height+10;
                        })
                        .attr("font-size", 9)
                        .text(function(d) {
                            return d.state;
                        });
            });
​
​
        </script>
​
    </body>
</html>
    