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The key prop helps React efficiently update lists.

componentDidUpdate is called after props or state changes.

React.memo prevents unnecessary re-rendering of components.

useRef provides a way to access DOM elements or persist values.

Props are read-only and cannot be updated directly.

ReactDOM.render renders a React component to the DOM.

useEffect runs after every render with its dependencies.

componentWillUnmount is called before a component is removed.

useContext accesses the value of a context in React.

useMemo() optimizes performance by memoizing expensive calculations.

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