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What is ReactJS?
ReactJS is an open-source JavaScript library used for building user interfaces, especially single-page applications. It allows developers to create reusable UI components.
What is a React Component?
A React Component is an independent, reusable piece of UI. Components can be class-based or function-based and accept inputs (props) and manage their own state.
What is JSX?
JSX (JavaScript XML) is a syntax extension for JavaScript that allows you to write HTML-like code within your JavaScript files. It is compiled down to React.createElement() calls.
What is 'State' in React?
In React, 'State' is an object that holds data or information about the component. It is mutable and can change over time, triggering a re-render of the component and its children.