Force directed layout of d3's dependencies

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<!DOCTYPE html>
<meta charset="utf-8">
<html>
​
<head>
<style>
​
.links line {
  stroke: #999;
  stroke-opacity: 0.6;
}
​
.nodes circle {
  stroke: #fff;
  stroke-width: 1.5px;
}
​
.node text {
  pointer-events: none;
  font: 10px sans-serif;
}
​
</style>
</head>
​
​
<body>
  <script src="https://d3js.org/d3.v4.js"></script>
​
  <svg width="960" height="600"></svg>
​
​
<script src="main.js"></script>
​
</body>
</html>
​
    

https://d3js.org/d3.v4.js