Login Listener - CometChat Docs

The CometChat SDK provides you with real-time updates for the login and logout events. This can be achieved using the LoginListener class provided. LoginListener consists of 4 events that can be triggered. These are as follows: Login Listener provides you with the below 4 methods:

Delegate Method	Information
loginSuccess(event)	Informs you that the login was successful and provides you with a user object containing the data for the user that logged in.
loginFailure(event)	Informs you about the failure while logging in the user and provides you with the reason for the failure wrapped in an object of the `CometChatException` class.
logoutSuccess()	Informs you about the user being logged out successfully.
logoutFailure(event)	Informs you about the failure while logging out the user. The reason for the failure can be obtained from the object of the `CometChatException` class.

To add the LoginListener, you need to use the addLoginListener() method provided by the SDK which takes a unique identifier for the listener and of the the LoginListener class itself.

var listenerID = "UNIQUE_LISTENER_ID";
CometChat.addLoginListener(
  listenerID,
  new CometChat.LoginListener({
      loginSuccess: (e) => {
          console.log("LoginListener :: loginSuccess", e);
      },
      loginFailure: (e) => {
          console.log("LoginListener :: loginFailure", e);
      },
      logoutSuccess: () => {
          console.log("LoginListener :: logoutSuccess");
      },
      logoutFailure: (e) => {
          console.log("LoginListener :: logoutFailure", e);
      }
  })
);

In order to stop receiving events related to login and logout you need to use the removeLoginListener() method provided by the SDK and pass the ID of the listener that needs to be removed.

var listenerID = "UNIQUE_LISTENER_ID";
CometChat.removeLoginListener(listenerID);