function useEffect(callback, dependencies) { const previousDependencies = useRef(dependencies); // Call the callback function if dependencies have changed if (!areDependenciesEqual(previousDependencies.current, dependencies)) { callback(); } // Update the previous dependencies // useRef를 이용해서 이전 값을 기억하기 때문에 // previousDependencies가 바뀌어도 리렌더링 되지 않습니다. previousDependencies.current = dependencies; ..
