React Hooks Implementation

Live Demo

Hooks

1. useState

useState is a hook that allows functional components to manage local state. It returns a stateful value and a function to update it, enabling you to create dynamic and interactive UIs.

2. useEffect

useEffect is used for side effects in functional components. It lets you perform tasks like data fetching, subscriptions, or manually changing the DOM in a clean and efficient way.

3. useRef

useRef returns a mutable object called a ref object, which has a .current property. It is commonly used to access and interact with the DOM directly or to persist values across renders without causing re-renders.

4. useReducer

useReducer is a powerful alternative to useState for managing more complex state logic. It accepts a reducer function and an initial state, providing a dispatch function to update the state based on actions.

5. useLayoutEffect

useLayoutEffect is similar to useEffect but fires synchronously after all DOM mutations. It's useful when you need to perform measurements or manipulate the DOM immediately after the browser paints.

6. useImperativeHandle

useImperativeHandle customizes the instance value that is exposed when using React.forwardRef. It allows you to control which properties of the component are exposed to the parent component when using ref.

7. useContext

useContext is used to consume values from a React context. It allows functional components to subscribe to a context's changes, providing a more straightforward way to share values like themes or authentication states.

8. useMemo

useMemo memoizes the result of a function, preventing unnecessary recalculations. It is beneficial for optimizing performance by caching expensive calculations or references.

9. useCallback

useCallback memoizes a callback function, preventing it from being recreated on each render. It is useful when passing callbacks to child components to avoid unnecessary re-renders.