# Property signature AddonCallbacks.frameToFrameMessage

Message sent by the add-on running in one frame to the add-on running in
another frame.

## Signature

    readonly frameToFrameMessage?: (message: FrameToFrameMessage) => void;

## Details

| Type | `(message: https://developers.google.com/workspace/meet/add-ons/reference/websdk/addon_sdk.frametoframemessage.md) => void` |
| Optional | Yes |
| Readonly | Yes |
|---|---|