What Are React Components?
React components are the core building blocks of a React application. Every UI element—buttons, forms, sections, pages—is created using components.
They allow developers to break an application into smaller, reusable pieces.
Types of React Components
1. Functional Components
These are simple JavaScript functions that return JSX.
Example:
function Welcome() {
return <h1>Hello, React!</h1>;
}
Functional components are:
- Easy to write
- Preferred in modern React
- Compatible with Hooks
2. Class Components
Class components were widely used before Hooks. They extend React.Component and contain lifecycle methods.
Example:
class Welcome extends React.Component {
render() {
return <h1>Hello, React!</h1>;
}
}
Today, they are less common but still exist in older projects.
Why Use Components?
✔ Reusability
Build once, use multiple times.
✔ Clean Code Structure
Each component handles one part of the UI, keeping code easy to maintain.
✔ Better Scalability
Large applications become manageable when split into components.
How Components Work
Components accept props (data input) and return JSX (UI output).
React updates only the necessary components when data changes.
Best Practices for Components
- Keep components small and focused
- Use meaningful names
- Prefer functional components
- Reuse components wherever possible
- Avoid deeply nested components
Conclusion
React components make development scalable, efficient, and organized. They are the foundation of how React builds modern user interfaces.
Citations
https://savanka.com/category/learn/react/
https://www.w3schools.com/REACT/DEFAULT.ASP