> ## Documentation Index
> Fetch the complete documentation index at: https://cometchat-22654f5b-docs-rn-guide-message-privately.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Transient Messages

> Transient Messages — CometChat documentation.

Transient messages are messages that are sent in real-time only and are not saved or tracked anywhere. The receiver of the message will only receive the message if he is online and these messages cannot be retrieved later.

## Send a Transient Message

You can use the `sendTransientMessage()` method to send a transient message to a user or in a group. The receiver will receive this information in the `onTransientMessageReceived()` method of the `MessageListener` class. In order to send the transient message, you need to use the `TransientMessage` class.

<Tabs>
  <Tab title="User">
    ```javascript theme={null}
    let receiverId = "UID";
    let receiverType = CometChat.RECEIVER_TYPE.USER;
    let data = { "LIVE_REACTION": "heart" };

    let transientMessage = new CometChat.TransientMessage(receiverId, receiverType, data);
    CometChat.sendTransientMessage(transientMessage);
    ```
  </Tab>

  <Tab title="Group">
    ```javascript theme={null}
    let receiverId = "GUID";
    let receiverType = CometChat.RECEIVER_TYPE.GROUP;
    let data = { "LIVE_REACTION": "heart" };

    let transientMessage = new CometChat.TransientMessage(receiverId, receiverType, data);
    CometChat.sendTransientMessage(transientMessage);
    ```
  </Tab>

  <Tab title="Typescript (User)">
    ```typescript theme={null}
    let receiverId: string = "UID";
    let receiverType: string = CometChat.RECEIVER_TYPE.USER;
    let data: Object = { "LIVE_REACTION": "heart" };

    let transientMessage: CometChat.TransientMessage = new CometChat.TransientMessage(receiverId, receiverType, data);
    CometChat.sendTransientMessage(transientMessage);
    ```
  </Tab>

  <Tab title="Typescript (Group)">
    ```typescript theme={null}
    let receiverId: string = "GUID";
    let receiverType: string = CometChat.RECEIVER_TYPE.GROUP;
    let data: Object = { "LIVE_REACTION": "heart" };

    let transientMessage: CometChat.TransientMessage = new CometChat.TransientMessage(receiverId, receiverType, data);
    CometChat.sendTransientMessage(transientMessage);  
    ```
  </Tab>
</Tabs>

## Real-time Transient Messages

*In other words, as a recipient, how do I know when someone sends a transient message?*

You will receive the transient message in the `onTransientMessageReceived()` method of the registered `MessageListener` class.

<Tabs>
  <Tab title="Message Listener">
    ```javascript theme={null}
    let listenerId = "UNIQUE_LITENER_ID";

    CometChat.addMessageListener(
    listenerId,
    new CometChat.MessageListener({
      onTransientMessageReceived: transientMessage => {
        console.log('transient message received', transientMessage);
      },
    })
    );
    ```
  </Tab>

  <Tab title="TypeScript">
    ```typescript theme={null}
    let listenerId: string = "UNIQUE_LITENER_ID";

    CometChat.addMessageListener(
      listenerId,
      new CometChat.MessageListener({
          onTransientMessageReceived: (transientMessage: CometChat.TransientMessage) => {
              console.log('transient message received', transientMessage);
          },
      })
    );
    ```
  </Tab>
</Tabs>

The `TransientMessage` class consists of the below parameters:

| Parameter        | Information                                                                                              |
| ---------------- | -------------------------------------------------------------------------------------------------------- |
| **sender**       | An object of the User class holding all the information. related to the sender of the transient message. |
| **receiverId**   | Unique Id of the receiver. This can be the Id of the group or the user the transient message is sent to. |
| **receiverType** | The type of the receiver - `CometChat.RECEIVER_TYPE.USER` or `CometChat.RECEIVER_TYPE.GROUP`             |
| **data**         | A JSONObject to provide data.                                                                            |