intro3.html

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
    <link type="text/css" rel="stylesheet" href="style.css"/>
  </head>
  <body>
    <div id="body">
      <div id="header">
        <pre style="font-size:36px;">
        <code>
// Update…
var p = d3.select("body").selectAll("p")
    .data([4, 8, 15, 16, 23, 42])
    .text(String);

// Enter…
p.enter().append("p")
    .text(String);

// Exit…
p.exit().remove();

</code></pre>
      </div>
      <div id="footer">
        Selections
      </div>
    </div>
    <script type="text/javascript" src="hijs/hi.js"></script>
  </body>
</html>