angular2-keycloak-integration(v3).js

  function setupCheckLoginIframe() {
      var promise = createPromise();

      if (!loginIframe.enable) {
          promise.setSuccess();
          return promise.promise;
      }

      if (loginIframe.iframe) {
          promise.setSuccess();
          return promise.promise;
      }

      var iframe = document.createElement('iframe');
      loginIframe.iframe = iframe;

      iframe.onload = function() {
          var realmUrl = getRealmUrl();
          if (realmUrl.charAt(0) === '/') {
              loginIframe.iframeOrigin = getOrigin();
          } else {
              loginIframe.iframeOrigin = realmUrl.substring(0, realmUrl.indexOf('/', 8));
          }
          promise.setSuccess();
          
          // Remove the check as this check is implicit
          //setTimeout(check, loginIframe.interval * 1000);
      }

      var src = getRealmUrl() + '/protocol/openid-connect/login-status-iframe.html';
      iframe.setAttribute('src', src );
      iframe.style.display = 'none';
      document.body.appendChild(iframe);

      var messageCallback = function (event) {
          if (event.origin !== loginIframe.iframeOrigin) {
              return;
          }
          var data = JSON.parse(event.data);
          var promise = loginIframe.callbackMap[data.callbackId];
          delete loginIframe.callbackMap[data.callbackId];

          if ((!kc.sessionId || kc.sessionId == data.session) && data.loggedIn) {
              promise.setSuccess(data.loggedIn);// add the data.loggedIn to the promise Success Method
          } else {
              kc.clearToken();
              promise.setError();
          }
      };

      window.addEventListener('message', messageCallback, false);

      // move this check outside of this function as we will use the success of the promise to
      // setup the check interval.
      
      /**
      var check = function() {
          checkLoginIframe();
          if (kc.token) {
              setTimeout(check, loginIframe.interval * 1000);
          }
      };*/

      return promise.promise;
  }

  function checkLogin() {
      checkLoginIframe().success(function () {
          if (kc.token) {
              setTimeout(checkLogin, loginIframe.interval * 1000);
          }
      }).error(function () {
          window.location.href = window.location.protocol + "//" + window.location.host;
      });
  }