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š§ Understanding useRef in React
- useRef is a React Hook used to create a mutable reference object for persistent values across renders.
- It allows direct access to DOM elements and does not trigger a re-render when .current value is changed.
- Key Characteristics of useRef include a mutable .current property, no re-render on change, and persistence across renders.
- It is safe to mutate ref.current inside event handlers or useEffect, but generally avoided during the rendering phase.
- Common use cases of useRef include accessing DOM nodes directly and storing mutable values like instance variables.
- For accessing DOM nodes, useRef is used to create a reference and attach it to a JSX element for direct manipulation.
- Ref persistent values can be updated without triggering re-renders, making it suitable for managing timers or internal states.
- useState triggers re-renders on value changes, while useRef does not, making it ideal for non-UI related mutable values.
- Understanding when to use useRef over useState is crucial for efficient React component development.
- useRef is recommended for direct DOM access and storing mutable data without impacting UI rendering.
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