View Source ExTDLib.Object.UpdateChatOnlineMemberCount (ExTDLib v0.0.4)
The number of online group members has changed. This update with non-zero number of online group members is sent only for currently opened chats. There is no guarantee that it is sent just after the number of online users has changed.
| Name | Type | Description |
|---|---|---|
| chat_id | string | Identifier of the chat. |
| online_member_count | number | New number of online members in the chat, or 0 if unknown. |
More details on telegram's documentation.