Introduction to React Components

In React, components are the building blocks of a user interface. They represent a piece of the UI that can be reused throughout the application.

Just like LEGO bricks can be combined in various ways to create different structures, React components can be combined to create complex UIs.

Components in React can be of two types: functional components and class components. Functional components are defined as JavaScript functions, while class components are defined as ES6 classes that extend the React.Component class.

Here's an example of a functional component in React:

1import React from 'react';
2
3function Greeting() {
4  return (
5    <div>
6      <h2>Hello, World!</h2>
7      <p>This is a functional component.</p>
8    </div>
9  );
10}
11
12export default Greeting;

This component is a simple greeting message that can be rendered anywhere in the application.

Functional components are easier to write, understand, and test. They are also recommended for most scenarios in React development. However, there are cases where class components are still useful, especially when working with complex state management or lifecycle methods.

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// React component example

​

import React from 'react';

​

function App() {

  return (

    <div>

      <h1>Welcome to AlgoDaily!</h1>

      <p>Learn and explore frontend development.</p>

    </div>

  );

}

​

export default App;