chatMemberFilter

^{ref / chat-members / chatMemberFilter}

Filter context to only find updates of type ‘chat_member’ where the status transitions from oldStatus to newStatus.

Example:

// listen for updates where a user leaves a channel
bot.chatType('channel').filter(
 chatMemberFilter('in', 'out'),
 (ctx) => {
   const { old_chat_member: oldChatMember, new_chat_member: newChatMember } =
     ctx.chatMember;
   // ...
 },
);

Note: To receive these updates the bot must be admin in the chat and you must add ‘chat_member’ to the list of allowed updates.

^Source

Type Parameters

C

C extends Context

Q1

Q1 extends ChatMemberQuery

Q2

Q2 extends ChatMemberQuery

Parameters

oldStatus

oldStatus: MaybeArray<Q1>

newStatus

newStatus: MaybeArray<Q2>