simple D3 line chart

copied from: https://leanpub.com/D3-Tips-and-Tricks/read#leanpub-auto-starting-with-a-basic-graph

HTML

<body></body>

CSS

body {
    font: 12px Arial;
}
path {
    stroke: steelblue;
    stroke-width: 2;
    fill: none;
}
.axis path, .axis line {
    fill: none;
    stroke: grey;
    stroke-width: 1;
    shape-rendering: crispEdges;
}

JavaScript

console.log("running")
var margin = {
    top: 30,
    right: 20,
    bottom: 30,
    left: 50
};
var width = 400 - margin.left - margin.right;
var height = 500 - margin.top - margin.bottom;

var parseDate = d3.time.format("%d-%b-%y").parse;

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

var xAxis = d3.svg.axis().scale(x)
    .orient("bottom");

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

var valueline = d3.svg.line()
    .x(function (d) {
    	console.log("x: " + d.shf)
      return x(d.shf);
    })
    .y(function (d) {
     	console.log("y: " + d.depth)
      return y(d.depth);
    });

var svg = d3.select("body")
    .append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
    .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

// Get the data
var data = [{
    depth: "10",
    shf: "3"
}, {
    depth: "20",
    shf: "7"
}, {
    depth: "30",
    shf: "3"
}, {
    depth: "40",
    shf: "5"
}, {
    depth: "50",
    shf: "1"
}, {
    depth: "60",
    shf: "0"
}];

data.forEach(function (d) {
    d.depth = +d.depth;
    d.shf = +d.shf;
});

// Scale the range of the data
x.domain(d3.extent(data, function (d) {
		console.log("x domain: " + d.shf)
    return d.shf;
}));

y.domain([10, d3.max(data, function (d) {
		console.log("y domain: " + d.depth)
		return d.depth;
})]);

svg.append("path") // Add the valueline path.
.attr("d", valueline(data));

svg.append("g") // Add the X Axis
.attr("class", "x axis")
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);

svg.append("g") // Add the Y Axis
.attr("class", "y axis")
    .call(yAxis);