useRef Hook

useRef is a React hook that provides a mutable reference object. This object’s .current property persists across renders and does not trigger re-renders when updated. It’s commonly used for:

• Accessing DOM elements directly

• Persisting values across renders without re-rendering

• Holding timer IDs or previous values

Example: Accessing a DOM element

const inputRef = useRef();
useEffect(() => {
  inputRef.current.focus();
}, []);

Example: Persisting a value

const renderCount = useRef(0);
renderCount.current += 1;

Here, renderCount tracks the number of renders without causing infinite loops (as updating state would).

useRef is lightweight and versatile, acting as React’s escape hatch when you need to interact with the DOM or retain non-reactive state between renders.

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