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Stacked Chart
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Stacked Chart
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<html>
<head>
<meta charset="utf-8" />
<script src="https://d3js.org/d3.v6.min.js"></script>
<script src="https://d3js.org/d3-selection-multi.v1.min.js"></script>
</head>
<style type="text/css">
button {
display: flex;
justify-content: center;
}
</style>
<body>
<svg width="700" height="500"></svg>
<script>
const arr = [
{
name: "A",
dataset_1: 5,
dataset_2: 6,
},
{
name: "B",
dataset_1: 7,
dataset_2: 22,
},
{
name: "C",
dataset_1: 33,
dataset_2: 23,
},
{
name: "D",
dataset_1: 20,
dataset_2: 12,
},
{
name: "E",
dataset_1: 21,
dataset_2: 15,
},
{
name: "F",
dataset_1: 15,
dataset_2: 18,
},
];
//function for adding dataset
let counter = 2;
const add_set = (arr) => {
const ran = () => Math.floor(Math.random() * 20 + 1);
const add = (arr) => {
counter++;
arr.map((i) => (i[`dataset_${counter}`] = ran()));
};
add(arr);
};
//function for removing dataset
const remove_set = (arr) => {
arr.map((i) => delete i[`dataset_${counter}`]);
counter >= 1 ? counter-- : counter;
};
let keys, stack;
const updateData = () => {
keys = Object.keys(arr[0]).filter((i) => i !== "name");
stack = d3
.stack()
.keys(keys)(arr)
.map((d) => (d.forEach((v) => (v.key = d.key)), d));
};
//initial variables
let svg, width, height, g, groups, rect;
let margin = { left: 50, right: 50, top: 60, bottom: 30 };
let colorScale = d3.scaleOrdinal().range(d3.schemeSet3);
let dataSets;
let categoriesNames, xScale, copy, yScale, legend;
const setup = () => {
//No.1 set up svg and axes, this section runs only once
svg = d3.select("svg");
width = +svg.attr("width") - margin.left - margin.right;
height = +svg.attr("height") - margin.top - margin.bottom;
g = svg
.append("g")
.attr(
"transform",
"translate(" + margin.left + "," + margin.top + ")"
);
};
let xAxis, yAxis, x, y;
const setAxes = () => {
updateData();
svg.select(".x.axis").remove();
svg.select(".y.axis").remove();
x = d3
.scaleBand()
.domain(arr.map((d) => d.name))
.range([margin.left, width - margin.right])
.padding(0.1);
y = d3
.scaleLinear()
.domain([0, d3.max(stack, (d) => d3.max(d, (d) => d[1]))])
.rangeRound([height - margin.bottom, margin.top]);
xAxis = (g) =>
g
.attr("transform", `translate(0,${height - margin.bottom})`)
.attr("class", "x axis")
.call(d3.axisBottom(x).tickSizeOuter(0))
.call((g) => g.selectAll(".domain").remove());
yAxis = (g) =>
g
.attr("transform", `translate(${margin.left},0)`)
.attr("class", "y axis")
.call(d3.axisLeft(y).ticks(null, "s"))
.call((g) => g.selectAll(".domain").remove());
svg.append("g").call(xAxis);
svg.append("g").call(yAxis);
};
setup();
// repeat draw function
const draw = () => {
setAxes();
//No.3 draw chart
formatValue = (x) => (isNaN(x) ? "N/A" : x.toLocaleString("en"));
let chart = svg.selectAll("rect").data(stack, (d) => d);
chart.exit().remove();
svg
.append("g")
.selectAll("g")
.data(stack)
.join("g")
.attr("fill", (d) => colorScale(d.key))
.selectAll("rect")
.data((d) => d)
.join("rect")
.attr("x", (d, i) => x(d.data.name))
.attr("y", (d) => y(d[1]))
.attr("height", (d) => y(d[0]) - y(d[1]))
.attr("width", x.bandwidth())
.append("title")
.text(
(d) => `${d.data.name} ${d.key}
${formatValue(d.data[d.key])}`
);
legend = svg.selectAll(".legend").data(stack);
legend.exit().remove();
let newLegend = legend.enter().append("g").attr("class", "legend");
newLegend
.append("rect")
.attr("x", (d, i) => i * 51 + 51)
.attrs({ y: 0, width: 51, height: 10 })
.style("fill", (d) => colorScale(d.key));
newLegend
.append("text")
.attr("x", (d, i) => (i + 1) * 51)
.attr("y", 25)
.text((d) => d.key)
.attrs({ fill: (d) => colorScale(d.key), "font-size": 12 });
};
setup();
draw();
const update = () => {
add_set(arr);
draw();
};
const remove = () => {
remove_set(arr);
draw();
};
d3.select("body")
.append("button")
.text("Add dataset")
.on("click", update);
d3.select("body")
.append("button")
.text("Remove dataset")
.on("click", remove);
</script>
</body>
</html>