useNetworkState Hook React

import { useState, useEffect } from "react";

const useNetworkState = () => {
  const [networkState, setNetworkState] = useState(navigator.onLine);

  const handleOnline = () => {
    setNetworkState(true);
  };

  const handleOffline = () => {
    setNetworkState(false);
  };

  useEffect(() => {
    window.addEventListener("online", handleOnline);
    window.addEventListener("offline", handleOffline);

    return () => {
      window.removeEventListener("online", handleOnline);
      window.removeEventListener("offline", handleOffline);
    };
  }, []);

  return networkState;
};

// Usage
const NetworkStateExample = () => {
  const isOnline = useNetworkState();

  return (
    <div>{isOnline ? <p>You are online.</p> : <p>You are offline.</p>}</div>
  );
};