agora-react-native-rtm/lib/module/hooks/useRtmEvent.js

React Native around the Agora RTM SDKs for Android and iOS agora

import { useEffect, useRef } from 'react';
function listen(listenable, event, listener) {
  listenable.addEventListener(event, listener);
  return () => listenable.removeEventListener(event, listener);
}
export function useRtmEvent(client, event, listener) {
  const listenerRef = useRef(listener);
  useEffect(() => {
    listenerRef.current = listener;
  }, [listener]);
  useEffect(() => {
    if (client) {
      return listen(client, event, (...args) => {
        if (listenerRef.current) {
          listenerRef.current(...args);
        }
      });
    } else {
      return () => {
        throw new Error('client is null');
      };
    }
  }, [event, client]);
}
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