What Are Components And JSX In React JS

Components and JSX In React Js

In React, components are the building blocks of a user interface. They are reusable pieces of code that can be used to create the structure and functionality of a page. Components can be either functional or class-based.

 

Functional components are simple JavaScript functions that take in props (short for properties) and return a React element. They do not have their own state and lifecycle methods, but they can still handle user interactions and other events using props and callbacks.

Class-based components, on the other hand, are defined as JavaScript classes and have their own state and lifecycle methods. They can also handle user interactions and events, but they have more capabilities than functional components.

 

What Is JSX?

JSX is a syntax extension for JavaScript that allows you to write HTML-like elements in your JavaScript code. It is used to create the structure of a React component by defining its elements and components. In JSX, you can define the layout and content of a component using HTML-like tags, and then use JavaScript to add dynamic functionality.

JSX is transformed into JavaScript using a tool called Babel, which allows you to use it in your React code. When the component is rendered, the JSX code is transformed into the actual HTML elements that will be displayed in the browser.

In summary, components in React are the building blocks of a user interface and they can be either functional or class-based. JSX is a syntax extension for JavaScript that allows you to define the layout and content of a component using HTML-like tags, while still being able to use JavaScript to add dynamic functionality.

 

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