simple histogram layout

Very simple example of employing histogram layout to create a histogram.

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<!DOCTYPE html>
<html>
<head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.13.0/d3.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3-legend/2.25.6/d3-legend.min.js"></script>
    <style> 
        
    </style>
</head>
<body>
​
    <script src="histogram.js"></script>
</body>
</html>
    

https://cdnjs.cloudflare.com/ajax/libs/d3/4.13.0/d3.js

https://cdnjs.cloudflare.com/ajax/libs/d3-legend/2.25.6/d3-legend.min.js