title: Retrieve Custom Attribute from JavaScript (using Javascript Adapter) Keycloak
body: <p>I have a keycloak user with custom attributes like below.
  <a href="https://i.stack.imgur.com/QDIIE.png" rel="noreferrer"><img src="https://i.stack.imgur.com/QDIIE.png" alt="keycloak custom attribute"></a></p>
  
  <p>I use Reactjs for front-end. I want to retrieve the custom attribute from the javascript side. Like this answer states.</p>
  
  <p><a href="https://stackoverflow.com/a/32890003/2940265">https://stackoverflow.com/a/32890003/2940265</a></p>
  
  <p>But I can't find how to do it on the javascript side.</p>
  
  <p>I debugged in Chrome but I can't find a suitable result for custom attributes.</p>
  
  <p>Please help</p>