title: FS module to read CSV file
body: <p>I'm new with node js and I tried to use the module "fs" but I have always the same error that I can't understand: " Cannot find module 'fs' ".
  The code is: </p>
  
  <pre><code>     const fs = require('fs');
        fs.createReadStream("data/dataset.csv", "utf8", function(error, data)
          {
            data = d3.tsv.parse(data);
            console.log(JSON.stringify(data));
          }
        );
  </code></pre>
  
  <p>Can someone help me?
  Thank you</p>