title: Keycloak JavaScript Adapter receives 400 Bad Request in Internet Explorer
body: <p>I'm using Keycloak's JavaScript Adapter to connect a web application with the SSO of my workplace. The code looks like this (server data is loaded via they keycloak.json file):</p>
  
  <pre><code>const keycloak = Keycloak();
  keycloak.init({onLoad: "login-required"}).success(authenticated =&gt; {
      ...
  }).error(() =&gt; {
      ...
  });
  </code></pre>
  
  <p>It works as intended on Firefox and Chrome, but on Internet Explorer (v. 11) the POST request for the token returns a 400 Bad Request. Is this a problem with my configuration of Internet Explorer or of Keycloak-js itself? Here is a <a href="https://i.stack.imgur.com/ICITZ.png" rel="nofollow noreferrer">screenshot</a> from IE.</p>