Understanding Components in React Fundamentals

What Are React Components?

React components are the building blocks of any React application. They describe a part of the user interface and how it should appear on the screen.

Each component can manage its own content, structure, and behavior, making it easier to build and maintain complex UIs.

• Encapsulate UI and logic in one place.
• Can be reused throughout the application.
• Help organize code into manageable pieces.

Types of React Components

React supports two main types of components: functional components and class components. Both serve the same purpose but differ in syntax and capabilities.

Functional components are simpler and preferred in modern React development, especially with the introduction of hooks.

• Functional Components: JavaScript functions that return JSX.
• Class Components: ES6 classes extending React.Component with a render method.

Creating a Simple Functional Component

Let's create a simple functional component that displays a greeting message. Functional components return JSX, which looks like HTML but is actually JavaScript.

Passing Data with Props

Props (short for properties) allow you to pass data from a parent component to a child component. This makes components dynamic and reusable.

Props are read-only and should not be modified by the child component.

• Props are passed as attributes in JSX.
• Child components receive props as function parameters or via this.props in class components.
• Props enable customization of components.