Server Request and D3

Client-Server Model
d3js.org:80
request <-> response
AJAX
data.json

function draw(data){
	var width = 420;
		barHeight = 20;

	var x = d3.scale.linear()
		.range([0, width]);

	var chart = d3.select(".chart")
		.attr("width", width);

	x.domain([0, d3.max(data, function(d){ return d.value; })]);

	chart.attr("height", barHeight * data.length);

	var bar = chart.selectAll("g")
		.data(data)
		.enter().append("g")
			.attr("transform", function(d, i){ return "translate(0," + i * barHeight + ")"});

	bar.append("rect")
		.attr("width", function(d) { return x(d.value); })
		.attr("height", barHeight - 1);

	bar.append("text")
		.attr("x", function(d) { return x(d.value) - 3;})
		.attr("y", barHeight / 2)
		.attr("dy", ".35em")
		.text(function(d) { return d.value: }):
}