What is the method to retrieve data from within a useEffect block externally?

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To retrieve data from within a useEffect block externally, you can use state management tools such as React Context, Redux, or pass a callback function down to the child components. You can also use the useRef hook to store the data generated in the useEffect block and access it externally. The useRef hook allows you to store values that persist between component re-renders and can be accessed from both within and outside of the component.