🧩 Understanding React Components: A Beginner-Friendly Guide

Sainath Mhetre — Sun, 27 Jul 2025 13:27:50 +0000

React has taken the front-end development world by storm — and at the heart of React lies one core concept: components. Whether you’re building a simple UI or a complex web app, components are the building blocks of any React project.

In this post, we’ll walk through:

What React components are

Functional vs Class components

Props and state basics

Composing components

Best practices

function HelloWorld() {
  return <h1>Hello, world!</h1>;
}

🧠 Functional vs Class Components
There are two types of components in React:

Functional Components (Modern & Preferred)

function Welcome(props) {
  return <h1>Hello, {props.name}</h1>;
}

DEV Community: Sainath Mhetre

🧩 Understanding React Components: A Beginner-Friendly Guide