Data can also come from components that come from props

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Virtual Document Objects (DOM)
In React, a data cache structure is created in memory to calculate how many changes were made, to be updated later by the browser .

React JS Data
Special features that are tasked with creating code such as rendering the entire page austria email list may be done by the user on each change. In fact, it is the work of the React Library that allows for the creation of these various changes.

5. State and Lifecycle
State is the origin of data. Every component in React requires data, although not all. This data can come from various sources, and state is one of the sources of this data.
In a React component, there are three types of lifecycle, namely: mounting or initialization (when the component is first formed or added to the DOM), update or rerender (when there is a change in props or state that changes the DOM), and unmounting (when the component is removed from the DOM).

In each lifecycle , React will process different functions or commonly called lifecycle methods . There are methods that have the prefix will and did to display when the method is processed.

React JS and React Native, What's the Difference?
Although similar, they are two different things. Knowing this difference is important before starting mobile app development . React Native is a framework , while React JS is a JavaScript library commonly used on websites.

React Native is very helpful for developers in making applications more real and interesting even with the help of JavaScript alone. React Native can also be supported in Android and iOS. With just one coding, React Native can work on iOS and Android platforms quickly and optimally in its development.