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React Hooks are a game-changing feature in the React library that started within it from version 16.8, after which classical practices began to change in building the React Application.
Rules
React Hooks are functions that let someone “hook into” the features of React—such as state and lifecycle methods—from functional components. It provides an occasion to reuse stateful logic between various components without those complex inheritance hierarchies or higher-order components.
Hooks are a solution to quite a few of the problems that most developers will have when working with React: the complexity of class components, the difficulty of reusing stateful logic between different elements, and the need for complex state management solutions. Hooks, developers are in a position to write more concise code, make better reuse of logic, and elevate testability—to enhance productivity and higher-quality React applications.
One of the most prominent advantages of Hooks is that it makes it easier to deal with state and lifecycle methods without class components. This will leave your code readable, maintainable, and easy to reason about when larger and more complex React applications are in question.
Any functional component may include React Hooks, but they are useful in the following cases:
React Hooks are available in different types with different purposes and use cases:
The simplest and most common one in use would be the useState Hook. It gives a way to provide functional components with a state. And offers a set of functions to deal with this state. This comes quite in handy, when handling simple states like counters, form inputs, or toggling states.
It can be used with React Context, which allows access to data across the component tree. Without having to explicitly pass props down from one level of the tree to the next. It is useful, especially when one wants to share data between multiple components. One could have easily done this without creating a class component or a higher-order component.
The user hook returns a mutable reference, which is an object having a current property. Whose value will either be null when the component hasn’t mounted, or the current value has passed. This can be particularly useful in scenarios involving handling underlying DOM elements, managing focus, or just storing a value that is supposed to be retrieved over many renders.
The effect hook allows adding side effects, such as directly changing the DOM or fetching data from APIs, subscription to events, and other activities in functional components. Through this Hook, one is able to replicate class component lifecycle methods, including componentDidMount, componentDidUpdate, and componentWillUnmount.
The useMemo and useCallback hooks memoize long computations and callbacks, respectively, for the improvement of a React application’s performance. What is more, these hooks show themselves especially useful in circumstances when you have components that execute some expensive calculations or when you want to pass callbacks down to child components.
Finally, you can use LayoutEffect and ImperativeHandle to manage the lifecycle of resources in functional components. More specifically, these types of hooks are helpful if you want to ensure that some side effects run synchronously or if you need to expose an imperative API to the parent component.
It also has a number of other hooks like useReducer, useDebugValue, and useTransition that resolve other more specialized issues. These hooks help in the management of complicated states, debugging information, or transitions between different states of UI.
Knowing and utilizing these different types of hooks will help you create powerful and efficient React applications that are easy to maintain and scale over time.
Also Read React Compiler: Everything You Need to Know
Among the many advantages of using React Hooks, the most prominent are the following:
The source of confusion and complexity within class components is this keyword, most especially when dealing with event handlers or lifecycle methods. Hooks eliminate this keyword, making such code pretty straightforward and easier to understand.
Hooks, sharing stateful logic between different components was problematic. It often required using higher-order component patterns or complex inheritance hierarchies. Hooks exposes a way to reuse stateful logic without these complex patterns. It leads to more modular and maintainable code.
Class components can get complex and a pain to manage in cases where one is dealing with multiple lifecycle methods or state management. With hooks, the approach to building React applications is much easier and modular for handling difficult scenarios more easily and maintaining codebases over time much more manageable.
It’s in addressing these pain points that hooks have made doing a React application much easier to build and maintain. This has increased productivity with better quality code.
Here are some rules of Hooks are:
You simply need to import the desired Hook from the ‘react’ library. And use it in your functional component to be able to use Hooks in your React application.
Hooks in React JS and class components can achieve similar results, they have some key differences.
Hooks in react js are a way to add state and lifecycle methods to functional components, making them more powerful and versatile through React course.
Related Post : How to Add Image in React JS
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