React js can be used to create interactive websites. Using the virtual DOM, developers can update DOM sections instead of reloading the entire page. This can improve performance, especially when dealing with computationally-heavy tasks. Popular websites use this technology to create dynamic content and user interaction.

React is structured around components, each of which has its own set of properties and functions. These properties and functions are passed to child components from the parent component. The top level component is known as “App.” State is a big concept in React. It refers to an object that stores a set of observable properties that can change as the user interacts with an interface.

In React, components are rendered using the latest data. This means that the entire page doesn’t have to be reloaded, making it much faster. This also means that if a user clicks on a link, it won’t cause the page to crash. Instead, the virtual DOM will be refreshed to reflect the new state of the data.

A common performance concern in React applications is component re-rendering. Fortunately, there are a few ways to minimize unnecessary re-renders and maximize the performance of your React app. You can use actions to trigger re-renders, and hooks and memoization to minimize costly data calculations.

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