Sankey diagram with vega.js

Sankey diagram with vega.js.

Copied from a vega implementation for Elastic Search, made by yurik.
Full spec example here, with some bug fixes from the original implementation

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<html>
  <head>
    <title></title>
    <script src="https://cdn.jsdelivr.net/npm/vega@4"></script>
  <script src="https://cdn.jsdelivr.net/npm/vega-embed@3"></script>
    <style>
      body {
        font-family: sans-serif;
      }
    </style>
​
  </head>
  <body>
    <div id="vis" style="height: 500px;"></div>
  </body>
  <script type="text/javascript">
  vegaEmbed('#vis', 'vega-spec.json', {defaultStyle: true});
  </script>
  </html>
    

https://cdn.jsdelivr.net/npm/vega@4

https://cdn.jsdelivr.net/npm/vega-embed@3