score:3

Accepted answer

The problem is just the x domain. Since you have negative values, instead of:

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

It should be:

``````x.domain(d3.extent(data, function (d) {
return d.value;
}));
``````

Here is a demo using your code with fake data:

``````var margin = {top: 30, right: 10, bottom: 50, left: 50},
width = 500,
height = 300;

var data = [{value: 10, dataset:"barbaz"},
{value: 40, dataset:"barbar"},
{value: -10, dataset:"foobaz"},
{value: 50, dataset:"foobar"},
{value: 30, dataset:"baz"},
{value: -20, dataset:"bar"},
{value: 70, dataset:"foo"}];

// Add svg to
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 + ')');

// set the ranges
var y = d3.scaleBand()
.range([height, 0])
.padding(0.1);

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

// Scale the range of the data in the domains
x.domain(d3.extent(data, function (d) {
return d.value;
}));
y.domain(data.map(function (d) {
return d.dataset;
}));

// append the rectangles for the bar chart
svg.selectAll(".bar")
.data(data)
.enter().append("rect")
.attr("class", function (d) {
return "bar bar--" + (d.value < 0 ? "negative" : "positive");
})
.attr("x", function (d) {
return x(Math.min(0, d.value));
})
.attr("y", function (d) {
return y(d.dataset);
})
.attr("width", function (d) {
return Math.abs(x(d.value) - x(0));
})
.attr("height", y.bandwidth());

// add the x Axis
svg.append("g")
.attr("transform", "translate(0," + height + ")")
.call(d3.axisBottom(x));

// add the y Axis
svg.append("g")
.attr("class", "y axis")
.attr("transform", "translate(" + x(0) + ",0)")
.call(d3.axisRight(y));``````
``````.bar--positive {
fill: steelblue;
}

.bar--negative {
fill: darkorange;
}``````
``<script src="https://d3js.org/d3.v4.min.js"></script>``