Introduction to ReactJS Components

This module introduces the foundational ideas that make React development possible and powerful. You’ll learn about components, functions and event handling, state and the useState Hook, and how you render a list of items dynamically in your To-Do List app—each one explained simply, practically, and in context.

Components are the building blocks of any React application. Think of a component as a chunk of the UI—a function that returns some JSX to display. With React, you can design your UI as a tree of components, each one responsible for rendering specific content and handling its own logic.

We typically create one main App component and other smaller components (like Todo and Footer) that can be reused.

In This App:

• You have a single main function component: App.
• App manages everything: input, button, todo list, and logic.