useIsChannelMember

Returns whether the user with the given id is already a member of the channel.

Best Practices

Use this hook to drive "Add" / "Remove" affordances when managing channel members.
Pass the id of the user you want to check; omit it and the hook returns false.
Treat the result as derived state from the channel members and avoid local duplication.
Useful when building add-member flows to filter out users who already belong to the channel.

import { useIsChannelMember } from "stream-chat-react-native";

const isMember = useIsChannelMember(channel, user.id);

Name	Type	Required	Description
channel	`Channel`	Yes	Channel whose members are checked.
userId	`string`	No	Id of the user to look for. `false` if omitted.

Type	Description
`boolean`	Whether the given user is a member of the channel.