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            1) React Hook Usestate is a built-in function in React that allows you to add state to functional components. It is a replacement for the this.state property in class components. The useState hook takes an initial state value as its argument, and returns an array containing two elements: the current state value, and a function that can be used to update the state. 2) React Hook UseEffect useEffect is a built-in React Hook that allows you to perform side effects in functional components. It is used to manage the lifecycle of a component and to interact with external resources such as APIs or web sockets. The useEffect hook takes two arguments: a callback function and an array of dependencies. The callback function is executed after the component has rendered, and it can contain any code that causes side effects, such as modifying the DOM or making network requests. The callback function can also return a cleanup function that will be execu...
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  React Router is a library for managing navigation in a React-based web application. It allows you to define routes and map them to different components, allowing users to navigate between different views in your application without reloading the page. React Router provides several components, including: <BrowserRouter> : This component is used to set up routing for your application using HTML5 history API. <Switch> : This component is used to render only the first child <Route> or <Redirect> that matches the current location. <Route> : This component is used to define a route with a path and a component to render when that path is matched. <Link> : This component is used to navigate to different routes within your application. React Router also provides hooks like useHistory , useLocation , and useParams that you can use in your components to interact with the routing state. Overall, React Router provides a flexible and easy-to-use solution ...
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React js

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IMPORTANT TOPICS OF REACT JS .  JSX: JSX is a syntax extension that allows you to write HTML-like code in your JavaScript files, making it easier to build React components. Components: React is built around the idea of components, which are reusable pieces of UI that you can compose together to build complex applications. Props: Props are how you pass data from a parent component to a child component in React. They are essentially the parameters of a function. State: State is how you manage data that changes over time in a React component. When the state changes, React will automatically re-render the component. Lifecycle Methods: React provides several methods that allow you to hook into the lifecycle of a component, such as componentDidMount and componentDidUpdate. Forms: React provides a powerful way to handle form input, using the controlled component pattern. This allows you to keep the form data in the component's state. React Router: React Router is a library that allows you...
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