chart = {
const root = d3.hierarchy(data);
const links = root.links();
const nodes = root.descendants();
const simulation = d3.forceSimulation(nodes)
.force("link", d3.forceLink(links).id(d => d.id).distance(0).strength(1))
.force("charge", d3.forceManyBody().strength(-50))
.force("x", d3.forceX())
.force("y", d3.forceY());
const svg = d3.create("svg")
.attr("viewBox", [-width / 2, -height / 2, width, height])
const link = svg.append("g")
.attr("stroke", "green")
.attr("stroke-opacity", 0.6)
.selectAll("line")
.data(links)
.join("line");
const tip = d3Tip()
.attr('class', 'd3-tip')
.offset([-10, 0])
.html(function(d) {
return "<strong>Name:</strong> <span style='color:red'>" + d.data.name + "</span>";
})
// janky tooltip
// d3.select('body')
// .append('div')
// .attr('id', 'tooltip')
// .attr('style', 'position: absolute; opacity: 0;');
const node = svg.append("g")
.attr('class', 'node')
.attr("fill", "#fff")
.attr("stroke", "#000")
.attr("stroke-width", 1.5)
.selectAll("circle")
.data(nodes)
.join("circle")
.attr("fill", d => d.children ? null : Math.random() > .5 ? "green" : "lightblue")
.attr("stroke", d => d.children ? null : Math.random() > .5 ? "yellow" : "green")
.attr("r", 3.5)
.call(drag(simulation))
.call(tip)
svg.selectAll(".node")
.data(data)
.enter().append("rect")
// .attr("class", "bar")
// .attr("x", function(d) { return x(d.letter); })
// .attr("width", x.rangeBand())
// .attr("y", function(d) { return y(d.frequency); })
// .attr("height", function(d) { return height - y(d.frequency); })
.on('mouseover', tip.show)
.on('mouseout', tip.hide)
// node.append("h1")
// .text(d => d.data.name)
function addTooltip(element) {
d3.select(element)
.append('div')
.attr('class', 'tooltip')
.attr('style', 'position: absolute; opacity: 1;')
.text(element)
}
// node
// .on('mouseover', () => addTooltip(this))
simulation.on("tick", () => {
link
.attr("x1", d => d.source.x)
.attr("y1", d => d.source.y)
.attr("x2", d => d.target.x)
.attr("y2", d => d.target.y)
.style("visibility", "hidden");
node
.attr("cx", d => d.x)
.attr("cy", d => d.y);
});
invalidation.then(() => simulation.stop());
return svg.node();
}
data = FileAttachment("flare-2.json").json()
height = 600
drag = simulation => {
function addTooltip(element) {
d3.select(element)
.append('div')
.attr('class', 'tooltip')
.style({position: 'absolute', opacity: 0.5, width: "60px"})
.text(element)
}
function dragstarted(event, d) {
if (!event.active) simulation.alphaTarget(0.3).restart()
d.fx = d.x;
d.fy = d.y;
}
function dragged(event, d) {
d.fx = event.x;
d.fy = event.y;
}
function dragended(event, d) {
if (!event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
d3 = require("d3@6")
d3Tip = require("d3-tip")
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
