title: How to read binary file byte by byte using javascript?
body: <p>I need to read the binary file byte by byte using javascript.I had got below code in this site,but its not working.I think i have to add some extra src file as a reference to it.Please help me to do it.here the code...</p>
  
  <pre><code>var fs = require('fs');
  var Buffer = require('buffer').Buffer;
  var constants = require('constants');
  
  fs.open("file.txt", 'r', function(status, fd) {
      if (status) {
          console.log(status.message);
          return;
      }
      var buffer = new Buffer(100);
      fs.read(fd, buffer, 0, 100, 0, function(err, num) {
          console.log(buffer.toString('utf-8', 0, num));
      });
  }); 
  </code></pre>