title: Write to CSV file locally with HTML5
body: <p>I was wondering whether HTML5 allows one to save/write to a local file within the user's file system. I'm asking this as I know that with HTML5 you can now export data from client and download it as a CSV file for example.</p>
  
  <p>If not with HTML5, what would be the best approach to overwrite the contents, or create a CSV (or any other type of file for that matter) locally from within the client-side script?</p>