It declares a state variable. found two extremely annoying bugs. It's intended to be the standard way to write Redux logic. It's also easy to use, with a simple, intuitive interface that makes it easy to get started. We added an "API slice" to our Redux store, defined "query" endpoints to fetch posts data, and a "mutation" endpoint to add a new post. The first React-Redux hook that we'll look at is the useSelector hook, which lets your React components read data from the Redux store. The UMD package can be used as a