title: Angular app to acknowledge where the user is coming from
body: <p>I have 3 different angular applications with 3 different url.</p>
  <ol>
  <li>Login app</li>
  <li>Launcher app</li>
  <li>Content app
  User need to access from
  login &gt; launcher &gt; content.
  And if they log out would be
  Content &gt; launcher &gt; login</li>
  </ol>
  <p>Since browser won't share the history detail to the angular app.
  Is there a good way to let the 2. Launcher app acknowledge the user is coming from 1. Login app but not 3. Content app?</p>