Declarative UI in React

React uses a declarative paradigm that makes it easier for developers to create and maintain complex user interfaces by allowing them to specify the desired state of the UI based on its current data with the specified state in place, react then takes care of the complex task of updating the DOM (Document Object Model).

import { useState} from 'react'

const Counter =() =>{
  const [count,setCount] = useState(0);

  const handleIncrement = () =>{
    setCount(count + 1);
  };

  return (
    <div>
      <h2>Counter: {count}</h2>
      <button onClick={handleIncrement}>Increment</button>
    </div>
  );
};

export default Counter;

Component-Based Architecture

Developers use a component-based architecture to build React Applications. Components are self-contained units that encapsulate a specific piece of functionality. Understanding component structure and composition is essential for developing scalable and maintainable React apps.

//Header.tsx
const Header =()=>{
    return(
        <header>
            <h1>React Apps</h1>
        </header>
    );
};

export default Header;

//SideMenu.tsx

const SideMenu =()=>{
    return(
        <ul>
            <li>Admin</li>
            <li>Trasaction</li>
            <li>Report</li>
        </ul>
    );
};

export default SideMenu;

// App.tsx

import Header from "./Header";
import SideMenu from "./SideMenu";


function App(){

  return (
    <>
    <Header />
    <SideMenu />
    
    </>
  );
}
    

export default App

Functional Components and Hooks

For Defining React components, functional components are now the preferred choice. And functional components may now gracefully manage state and side effects, through the introduction of hooks, such as “useState” and “useEffect”, and Code is now easier to read and maintain.

import { useState, useEffect} from 'react'

const Counter =() =>{
  const [count,setCount] = useState(0);

  useEffect( ()=> {
    document.title = 'Count: ${count}';
  },[count]);

 

  return (
    <div>
      <h2>Counter: {count}</h2>
      <button onClick={()=>  setCount(count+1)}>Counter</button>
    </div>
  );
};

export default Counter;

JSX

JSX is a syntax extension for JavaScript, that enables integrated HTML–like elements into JavaScript code. This not only enhances the expressiveness and readability of React components but is also a powerful tool for creating complex UI structures in a declarative manner.

const JsxComponent =()=>{
    return(
        <div>
            <h1>WelCome , React..!</h1>
            <p>Example of JSX-Powered component.</p>
        </div>
    );

};

export default JsxComponent;

Conclusion

React.js continues to be a powerful and widely adopted library for creating modern user interfaces. developers must become proficient in the newest ideas and industry best practices. In this article, we’ll discuss Key Concepts and Best Practices of React.

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