example4.jsx

export const SomeComponent = (props) => { 
    const [searchWorker, setSearchWorker] = useState();
  
    useEffect(() => {
        const searchWorkerInstance = new SearchWorker();
        setSearchWorker(searchWorkerInstance);
      
        // subscribe to worker messages
        searchWorkerInstance.onmessage(...);
        // do something with the worker on component init
        searchWorkerInstance.postMessage(...);
        
        return () => {
            // this runs when component unmounts 
            searchWorkerInstance.terminate();
        }
    }, []);
}