JSFiddle - React, Tailwind, and code Playground

by raviolicode

HTML

<script src="http://d3js.org/d3.v3.min.js"></script>

CSS

.link {
  stroke: #ccc;
}

.node text {
  pointer-events: none;
  font: 10px sans-serif;
}

JavaScript

var graph = {
    "nodes": [{"name": 1, "group": 1}, {"name": 2, "group": 2}, {"name": 3, "group": 2}, {"name": 4, "group": 3}],
    "links": [{"source": 1, "target": 2, "value": 1}, {"source": 3, "target": 4, "value": 1}]
}; 
/*,{"source":75,"target":25,"value":3},{"source":75,"target":48,"value":1},{"source":75,"target":41,"value":1},{"source":75,"target":70,"value":1},{"source":75,"target":71,"value":1},{"source":76,"target":64,"value":1},{"source":76,"target":65,"value":1},{"source":76,"target":66,"value":1},{"source":76,"target":63,"value":1},{"source":76,"target":62,"value":1},{"source":76,"target":48,"value":1},{"source":76,"target":58,"value":1}]}*/


console.log(graph.nodes.length);
console.log(graph.links.length);

var width = 960,
    height = 500;

var color = d3.scale.category20();

var force = d3.layout.force()
    .charge(-120)
    .linkDistance(30)
    .size([width, height]);

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

force
.nodes(graph.nodes)
.links(graph.links)
.start();

var link = svg.selectAll(".link")
.data(graph.links)
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return Math.sqrt(d.value); });

var node = svg.selectAll(".node")
.data(graph.nodes)
.enter().append("circle")
.attr("class", "node")
.attr("r", 5)
.style("fill", function(d) { return color(d.group); })
.call(force.drag);

node.append("title")
.text(function(d) { return d.name; });

force.on("tick", function() {
    link.attr("x1", function(d) { return d.source.x; })
    .attr("y1", function(d) { return d.source.y; })
    .attr("x2", function(d) { return d.target.x; })
    .attr("y2", function(d) { return d.target.y; });
    
    node.attr("cx", function(d) { return d.x; })
    .attr("cy", function(d) { return d.y; });
});