what is useSelector in React ?

 useSelector is a hook provided by the React-Redux library that allows you to extract data from the Redux store in your React components.

In React-Redux, the Redux store holds the entire state of your application. useSelector allows you to access a specific piece of state from the store in your React component.

Here's an example of how to use useSelector:

import React from 'react'; import { useSelector } from 'react-redux'; const MyComponent = () => { const myValue = useSelector(state => state.myReducer.myValue); return ( <div> <p>{myValue}</p> </div> ); }

In this example, useSelector is used to extract the myValue property from the myReducer reducer in the Redux store. The value of myValue will automatically update whenever the state in the Redux store changes.