[**RongIMLib**](../README.md)

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[RongIMLib](../globals.md) / IExtraDataKeyInMessage

# Type Alias: IExtraDataKeyInMessage

> **IExtraDataKeyInMessage** = `object`

消息中的附加信息 Key 定义

## Extended by

- [`ICombineV2MessageContent`](../interfaces/ICombineV2MessageContent.md)
- [`IHQVoiceMessageContent`](../interfaces/IHQVoiceMessageContent.md)
- [`IVoiceMessageContent`](../interfaces/IVoiceMessageContent.md)
- [`ICombineMessageContent`](../interfaces/ICombineMessageContent.md)
- [`ICommandMessageContent`](../interfaces/ICommandMessageContent.md)
- [`IFileMessageContent`](../interfaces/IFileMessageContent.md)
- [`IGIFMessageContent`](../interfaces/IGIFMessageContent.md)
- [`ICommandNotificationMessageContent`](../interfaces/ICommandNotificationMessageContent.md)
- [`IGroupNotificationMessageContent`](../interfaces/IGroupNotificationMessageContent.md)
- [`IImageMessageContent`](../interfaces/IImageMessageContent.md)
- [`IInformationNotificationMessageContent`](../interfaces/IInformationNotificationMessageContent.md)
- [`ILocationMessageContent`](../interfaces/ILocationMessageContent.md)
- [`IReferenceMessageContent`](../interfaces/IReferenceMessageContent.md)
- [`IRichContentMessageContent`](../interfaces/IRichContentMessageContent.md)
- [`ISightMessageContent`](../interfaces/ISightMessageContent.md)
- [`IStreamMessageContent`](../interfaces/IStreamMessageContent.md)
- [`ITextMessageContent`](../interfaces/ITextMessageContent.md)
- [`IRecallCommandMessageContent`](../interfaces/IRecallCommandMessageContent.md)

## Properties

### extra?

> `optional` **extra?**: `string`

消息中的附加信息