Simple bar chart (Data: randomly generated)

Simple example using D3 to create a bar chart of some randomly generated data

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>D3 example</title>
​
    <script src="//d3js.org/d3.v4.min.js" charset="utf-8"></script>
​
    <style>
        .bar {
            fill: red;
        }
    </style>
</head>
<body>
    <input type="button" onclick="update()" value="Update"/>
    <div id="vis">
    </div>
  <script src="script.js"></script>
  </body>
</html>
    
    

https://d3js.org/d3.v4.min.js