JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://d3js.org/d3.v4.min.js"></script>
<svg width="960" height="600"></svg>

JavaScript

var graph = JSON.parse('{"nodes":[{"id":"0","color":"#4444E5"},{"id":"1","color":"#4444E5"},{"id":"2","color":"#CCCCCC"},{"id":"3","color":"#CCCCCC"},{"id":"4","color":"#CCCCCC"},{"id":"5","color":"#CCCCCC"},{"id":"6","color":"#CCCCCC"},{"id":"7","color":"#CCCCCC"},{"id":"8","color":"#CCCCCC"},{"id":"9","color":"#CCCCCC"},{"id":"10","color":"#cc0000"},{"id":"11","color":"#CCCCCC"},{"id":"12","color":"#CCCCCC"},{"id":"13","color":"#CCCCCC"},{"id":"14","color":"#CCCCCC"},{"id":"15","color":"#cc0000"}],"links":[{"source":1,"target":15,"weight":-0.7582412523901727},{"source":0,"target":6,"weight":-0.08179822732917646},{"source":6,"target":10,"weight":0.0939757437427291},{"source":3,"target":4,"weight":0.436380368086641},{"source":4,"target":5,"weight":-0.5385567058738547},{"source":1,"target":2,"weight":-0.277729004201837},{"source":2,"target":3,"weight":0.7675128737907505},{"source":13,"target":14,"weight":0.5519067984674436},{"source":14,"target":15,"weight":0.832660697502495},{"source":5,"target":7,"weight":0.8607887414383458},{"source":7,"target":8,"weight":-0.8965760877371078},{"source":8,"target":9,"weight":-0.2488791800975232},{"source":9,"target":10,"weight":-0.646075500567235},{"source":12,"target":13,"weight":0.40622804770087395},{"source":0,"target":11,"weight":0.24806004723386413},{"source":11,"target":12,"weight":0.8035303834469385}]}');

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

  var simulation = d3.forceSimulation()
      .force("link", d3.forceLink().id(function(d) { return d.id; }))
      .force("charge", d3.forceManyBody())
      .force("center", d3.forceCenter(width / 2, height / 2));


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

  var node = svg.append("g")
      .attr("class", "nodes")
    .selectAll("circle")
   ...