What is the purpose of the useref hook in react?

 

Question: What is the purpose of the useref hook in react? 

The `useRef` hook in React is used to create and access a mutable object that persists for the full lifetime of a component. This hook is commonly used to access the DOM elements of a component, but it can also be used to store any mutable value that needs to persist across renders.

One common use case for `useRef` is to store a reference to a DOM element so that you can directly manipulate the element or access its properties. For example, you might use `useRef` to store a reference to an input element so that you can programmatically set its focus or read its value.

Another use case for `useRef` is to store a value that needs to persist across renders but should not trigger a re-render when it changes. For example, you might use `useRef` to store the previous value of a prop or state so that you can compare it to the current value in a `useEffect` hook.

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