Let's set up a basic D3 page, using the following code:
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title></title>
<script src="https://d3js.org/d3.v5.min.js" charset="utf-8">
</script>
<script src="https://cdn.rawgit.com/mahuntington/mapping-demo/master/map_data3.js" charset="utf-8">
</script>
</head>
<body>
<svg></svg>
<script src="app.js" charset="utf-8"></script>
</body>
</html>The only thing different than the setup we've used in previous chapters is the following line:
<script src="https://cdn.rawgit.com/mahuntington/mapping-demo/master/map_data3.js" charset="utf-8"...
