A Guide to the React useState Hook

A Guide to the React useState Hook

React ships with a handful of hooks — useState, useEffect, useContext, useRef, useMemo, useCallback, useLayoutEffect, useReducer, etc. In this article, we will focus on how to provision state on React components using the useState hook.

React hooks have been around for quite a while now (since the release of React 16.8) and have changed the way developers go about building React components — by basically writing JavaScript functions that can leverage the best parts of React such as state, context and some form of lifecycle behaviors.

A React component using hooks is defined using the regular JavaScript function syntax, not the ES6 class syntax. Now that makes a lot of sense, considering that prior to React hooks, a React component defined as a function will have to be refactored to use the ES6 class syntax, in order to add say some piece of state or lifecycle methods to the component. With React hooks, that is no longer necessary, as functions can still remain functions while leveraging the good parts of React. And there’s still more.

That said, React ships with a handful of hooks — useState, useEffect, useContext, useRef, useMemo, useCallback, useLayoutEffect, useReducer, etc. In this article, we will focus on how to provision state on React components using the useState hook. You can learn more about React hooks from the React documentation.




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