Choropleth Map with Interactive Filtering

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<!DOCTYPE html>
<html>
  <head>
    <title>Choropleth Map with Interactive Filtering</title>
    <link rel="stylesheet" href="styles.css">
    <script src="https://unpkg.com/d3@5.6.0/dist/d3.min.js"></script>
    <script src="https://unpkg.com/topojson@3.0.2/dist/topojson.min.js"></script>
  </head>
  <body>
    <svg width="960" height="500"></svg>
    <script src="bundle.js"></script>
  </body>
</html>
    

https://unpkg.com/d3@5.6.0/dist/d3.min.js

https://unpkg.com/topojson@3.0.2/dist/topojson.min.js