D3 Examples - Multi-touch bug demo

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Multitouch Test</title>
    <link rel="stylesheet" href="//necolas.github.io/normalize.css/7.0.0/normalize.css" />
    <link rel="stylesheet" href="//api.tiles.mapbox.com/mapbox-gl-js/v0.41.0/mapbox-gl.css" />
    <link rel="stylesheet" href="styles.css" />
  </head>
  <body>
    <div id="maps">
      <div id="map-1" class="map"></div>
      <div id="map-2" class="map"></div>
      <div id="map-3" class="map"></div>
      <div id="map-4" class="map"></div>
    </div>
    <script src="//api.tiles.mapbox.com/mapbox-gl-js/v0.41.0/mapbox-gl.js"></script>
    <script src="script.js"></script>
  </body>
</html>
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