React JS Hooks are a feature introduced in React JS 16.8 that allow developers to add state and lifecycle methods to functional components. Prior to the introduction of hooks, state and lifecycle methods were only available in class components. Hooks provide a way to add these features to functional components, which are simpler and easier to reason about.
In this article, we will explore the different types of React JS hooks and how they can be used to manage state and lifecycle methods in functional components.
State Hooks
State Hooks are used to manage state in functional components. The most commonly used State Hook is useState, which allows developers to add state to functional components. The useState Hook takes an initial value as an argument and returns an array with two values: the current state value and a function that can be used to update the state.
Effect Hooks
Effect Hooks are used to manage lifecycle methods in functional components. The most commonly used Effect Hook is useEffect, which allows developers to add lifecycle methods to functional components. The useEffect Hook takes a function as an argument, which is executed after the component is rendered.
Other Hooks
In addition to the State and Effect Hooks, React JS provides several other hooks that can be used to manage state and lifecycle methods in functional components. These include:
- useContext: Allows developers to access the nearest ancestor context value.
- useReducer: Allows developers to manage complex state logic using a reducer function.
- useCallback: Allows developers to memoize functions and prevent unnecessary re-renders.
- useMemo: Allows developers to memoize values and prevent unnecessary re-renders.
You can also create custom hooks in React JS.
In conclusion, React JS Hooks provide a way to add state and lifecycle methods to functional components, which are simpler and easier to reason about than class components. The State and Effect Hooks are the most commonly used hooks, but there are several other hooks that can be used to manage state and lifecycle methods in functional components. By using React JS Hooks, developers can write more concise and maintainable code.