Factorio Item Tree

A model of item hierarchy in the video game Factorio. A item's parents are required to produce it.

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    <style>
        body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    </style>
    <link rel="stylesheet" href="style.css">
</head>
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<body>
    <div id="graph"></div>
    <script src="data.js"></script>
    <script src="chart.js"></script>
</body>
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