20 villes Version 2

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<title>Bar Chart, Framed</title>
		<script type="text/javascript" src="//d3js.org/d3.v3.min.js" charset="utf-8"></script>
		<style type="text/css">
			
			body {
				margin: 0;
				background-color: white;
				font-family: sans-serif;
			}

#container {
				width: 650px;
				margin-left: auto;
				margin-right: auto;
				margin-bottom: 50px;
				margin-top: 50px;
				padding-top: 20px;
				padding-left: 20px;
				padding-right: 0px;
				padding-bottom: 10px;
				background-color: white;
				box-shadow: 2px 2px 3px 3px #fcfcfc;
				border-width:1px;
 							}

p {
				font-size: 14px;
				margin: 0px 0 0px 10px;
				}

a:link {
				text-decoration: none;
				color: gray;
			}

a:hover {
				text-decoration: underline;
			}

a:visited {
				color: gray;
			}

a:active {
				color: steelBlue;
			}

svg {
				background-color: white;
			}

g.bar  {
				cursor: pointer;
			}

g.bar text {
				font-size: 13px;
				font-family: helvetica;
				font-weight: bold;
				text-anchor: start;
				opacity: 0;
			}

g.bar:hover rect {
				fill: orange;
			}

g.bar:hover text {
				opacity: 1;
			}
			
			.axis path,
			.axis line {
				fill: none;
				stroke: black;
				shape-rendering: crispEdges;
			}
			
			
			.x.axis text {
				font-family: helvetica;
				font-size: 11px;
			}

.y.axis text {
				font-family: helvetica;
				font-size: 12px;
			}

.y.axis path,
			.y.axis line {
				opacity: 0;
			}

</style>
	</head>
	<body>

</div>

var w = 600;
			var h = 475;
			var padding = [ 35, 10, 30, 160 ]; //Top, right, bottom, left

var widthScale = d3.scale.linear()
								.range([ 0, w - padding[1] - padding[3] ]);
			
			var heightScale = d3.scale.ordinal()
								.rangeRoundBands([ padding[0], h - padding[2] ], 0.15);

var xAxis = d3.svg.axis()
							.scale(widthScale)
							.orient("bottom")
							.tickFormat(function(d) { return d; })
							.ticks(6)
							.outerTickSize(0);

var yAxis = d3.svg.axis()
							.scale(heightScale)
							.orient("left");

//Now SVG goes into #container instead of body
			var svg = d3.select("#container")
						.append("svg")
						.attr("width", w)
						.attr("height", h);

d3.csv("20villes.csv", function(data) {

data.sort(function(a, b) {
					return d3.descending(+a.catastrophes, +b.catastrophes);
				});

widthScale.domain([ 0, d3.max(data, function(d) {
					return +d.catastrophes;
				}) ]);

heightScale.domain(data.map(function(d) { return d.département; } ));

//Bind data to groups (not bars directly)
				var groups = svg.selectAll("g")
								.data(data)
								.enter()
								.append("g")
								.attr("class", "bar");

//Add a rect to each group
				var rects = groups.append("rect")
					.attr("x", padding[3])
					.attr("y", function(d) {
						return heightScale(d.département);
					})
					.attr("width", 0)
					.attr("height", heightScale.rangeBand())
					.attr("fill", "#0B74C7");

//Add a text element to each group
				groups.append("text")
					.attr("x", 170)
					.attr("y", function(d) {
						return heightScale(d.département) + 14;
					})
					.text(function(d) {
						return d.catastrophes + " arrêtés depuis 1982" ;
					});

rects.transition()
					.delay(function(d, i) {
						return i * 50;
					})
					.duration(2000)
					.attr("width", function(d) {
						return widthScale(d.catastrophes);
					})

svg.append("g")
					.attr("class", "x axis")
					.attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
					.call(xAxis);

svg.append("g")
					.attr("class", "y axis")
					.attr("transform", "translate(" + padding[3] + ",0)")
					.call(yAxis);

svg.append("text")
				.attr ("x", 30)
				.attr ("y", (padding[0] / 2))
				.style("font-size", "14px")
				.style("font-family", "Helvetica")
				.style("font-weight", "none")
				.style("font-style", "italic")
				.text("Nombre d’arrêtés de catastrophe naturelle par commune depuis 1982");

});

</script>
	</body>
</html>

https://d3js.org/d3.v3.min.js