title: How can JavaScript get data from a user's computer?
body: <p>How can Javascript (running from a website on a remote server) access data from a user's local computer?
  I have access to all the user's computers and they are all using Chrome.
  The data may be stored in a file, a database, I can even run a webserver on their computers if needed, etc.
  Is there any way for my users to for example allow my website to access data from JavaScript?
  (maybe be there is a Chrome setting but I still want their browser to be secure)</p>