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Introduction to React Components

Introduction to React Components

Understand what components are in React and how they form the building blocks of a React application.

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Building complex user interfaces can be challenging, but React simplifies this process by breaking the UI into manageable, reusable pieces called components. Understanding and being able to apply components well is essential for any React developer.

Components are the fundamental units of a React application. Think of them as JavaScript functions or classes that accept inputs and return React elements describing what should appear on the screen.

Why components matter

  • Reusability: Components allow us to reuse code, making our application more maintainable.

  • Modularity: Breaking the UI into components makes it easier to manage and debug.

  • Readability: A well-structured components hierarchy improves the readability of our code.

Creating our first component

Let’s create a simple functional component that displays a greeting message.

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function Greeting() {
  return <h1>Hello, World!</h1>;
}
export default Greeting;

  • Lines 1–3: We define a ...

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