title: implementing refresh-tokens with angular and express-jwt
body: <p>I want to implement the Sliding expiration concept with json web tokens using angular, nodejs and express-jwt. I'm a little confused on how to do this, and am struggling to find any example of refresh tokens or and other material relating to sessions with these technologies/frameworks. </p>
  
  <p>A few options I was thinking of were</p>
  
  <ul>
  <li>Generating a new token with each request after the initial login</li>
  <li>Keeping track of issued token on the server side along </li>
  </ul>
  
  <p>But I'm honestly not sure, please help</p>