To get notified when a user leaves a channel, you can use the Sendbird SDK’s event handler. Specifically, you can use the onUserExited callback function to receive a notification when a user exits a channel.
For example, in JavaScript, you can use the following code to register the event handler:
channel.onUserExited = (user) => {
console.log(${user.nickname} has left the channel.);
};
In this example, the onUserExited function is called whenever a user exits the channel, and the function logs a message to the console indicating which user has left the channel.
One use case for this feature is in a chat application where users may want to know when other users leave a channel. For example, if a user is having a conversation with another user in a channel and that user suddenly leaves, the remaining user may want to know that the conversation has ended. By using the onUserExited event handler, the remaining user can be notified when the other user leaves the channel.
Please refer to the below documentation for more information:
Javascript: https://sendbird.com/docs/chat/v4/javascript/event-handler/managing-channel-event-handlers/add-or-remove-a-channel-event-handler#1-add-or-remove-a-channel-event-handler
Android:
