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useEffect can be configured to run only on updates with dependencies.

React.StrictMode highlights potential issues in development.

useCallback memoizes callback functions to prevent unnecessary re-renders.

The key prop can indirectly help pass context, but props generally pass functions.

React.memo prevents a component from re-rendering if props are unchanged.

useRef() provides a mutable reference that persists across renders.

React.createElement creates a React element, which JSX compiles to.

React Router handles navigation and routing in React apps.

The key prop uniquely identifies elements in a list.

useEffect can run on mount and unmount with proper dependencies.

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