Add labels to bar chart D3 - d3.js

Question

I'm trying to add labels to my bar chart, and I can't make it work. I read a lot about it and tried many things already, but no success.
var margin = {top: 20, right: 20, bottom: 70, left: 40},
width = 600 - margin.left - margin.right,
height = 300 - margin.top - margin.bottom;
var parseDate = d3.timeParse("%Y-%m");
var x = d3.scaleBand().rangeRound([0, width]).paddingInner(0.05);
var y = d3.scaleLinear().range([height, 0]);
var xAxis = d3.axisBottom(x)
.tickFormat(d3.timeFormat("%Y-%m"));
var yAxis = d3.axisLeft(y)
.ticks(10);
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 + ")");
d3.csv("bar-data.csv", function(error, data) {
data.forEach(function(d) {
d.date = parseDate(d.date);
d.value = +d.value;
});
x.domain(data.map(function(d) { return d.date; }));
y.domain([0, d3.max(data, function(d) { return d.value; })]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis)
.selectAll("text")
.style("text-anchor", "end")
.attr("dx", "-.8em")
.attr("dy", "-.55em")
.attr("transform", "rotate(-90)" );
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Value ($)");
svg.selectAll("bar")
.data(data)
.enter().append("rect")
.style("fill", "steelblue")
.attr("x", function(d) { return x(d.date); })
.attr("width", x.bandwidth())
.attr("y", function(d) { return y(d.value); })
.attr("height", function(d) { return height - y(d.value); });
svg.selectAll("text")
.data(data)
.enter()
.append("text")
.text(function(d) {
return d.value;
})
.attr("text-anchor", "middle")
.attr("fill", "white")
.attr("x", function(d, i) {
return i * (width / data.length);
})
.attr("y", function(d) {
return height - (d * 4);
});
});
Here is my Plunker.
Any help is appreciated. Thank you in advance.

Answer 1

You can add labels to the bars using the snippet below -
svg.selectAll(".text")
.data(data)
.enter()
.append("text")
.attr("class","label")
.attr("x", (function(d) { return x(d.date); } ))
.attr("y", function(d) { return y(d.value) - 20; })
.attr("dy", ".75em")
.text(function(d) { return d.value; });
Your problem was here. The correct approach to get x-y positions for the labels would be the same approach you used for the bars using the x and y variables.
.attr("x", function(d, i) {
return i * (width / data.length);
})
.attr("y", function(d) {
return height - (d * 4);
});
Updated Plunkr - https://plnkr.co/edit/e6HPuph3OSbpxeEVQXfF?p=preview