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import React, { Component } from 'react';  class App extends React.Component {     render() {           return (            <div>                <h1>Default Props Example</h1>              <h3>Welcome to {this.props.name}</h3>               <p>Javatpoint is one of the best Java training institute in Noida, Delhi, Gurugram, Ghaziabad and Faridabad.</p>                    </div>          );      }  }  App.defaultProps = {     name: "JavaTpoint"  }  export default App;  Main.jsimport React from 'react';  import ReactDOM from 'react-dom';  import App from './App.js';    ReactDOM.render(<App/>, document.getElementById('app'));

Question

import React, { Component } from 'react';  class App extends React.Component {     render() {           return (            <div>                <h1>Default Props Example</h1>              <h3>Welcome to {this.props.name}</h3>               <p>Javatpoint is one of the best Java training institute in Noida, Delhi, Gurugram, Ghaziabad and Faridabad.</p>                    </div>          );      }  }  App.defaultProps = {     name: "JavaTpoint"  }  export default App;  Main.jsimport React from 'react';  import ReactDOM from 'react-dom';  import App from './App.js';    ReactDOM.render(<App/>, document.getElementById('app'));

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Solution

Sure, I can explain this code for you.

This is a simple React application. Let's break it down:

  1. We import the React library and the Component class from it. This is necessary to create a new React component.

  2. We define a new class App that extends React.Component. This means that App is a React component and it can be used in a React application.

  3. Inside the App class, we define a render method. This method returns the JSX (a syntax extension for JavaScript, similar to XML) that will be rendered to the DOM when the App component is used.

  4. In the JSX returned by the render method, we use this.props.name. props is a special object in React components that holds the properties passed to the component. In this case, we're

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Similar Questions

import React, { Component } from 'react';  class App extends React.Component {   constructor() {        super();              this.state = { displayBio: true };        }        render() {            const bio = this.state.displayBio ? (                <div>                    <p><h3>Javatpoint is one of the best Java training institute in Noida, Delhi, Gurugram, Ghaziabad and Faridabad. We have a team of experienced Java developers and trainers from multinational companies to teach our campus students.</h3></p>               </div>                ) : null;                return (                    <div>                        <h1> Welcome to JavaTpoint!! </h1>                        { bio }                     </div>                );       }  }  export default App;  To set the state, it is required to call the super() method in the constructor. It is because this.state is uninitialized before the super() method has been called.Output

import React from 'react';export function App(props) { return ( <div className='App'> <h1>Hello React.</h1> <h2>Start editing to see some magic happen!</h2> </div> );}// Log to consoleconsole.log('Hello console')

Which of the following is a class component? A class Welcome extends React.Component { render() { return <h1>Hello, {this.props.name} </h1>; } } const element = <Welcome name="World!" />; ReactDOM.render( element, document.getElementById('root')); B function Welcome(props) { return <h1>Hello, [props.name}</h1>; } const element = <Welcome name="World!" />; document.getElementById('root')); ReactDOM.render( element, C class Welcome extends React.Component { render() { function random(){ return <h1>Hello, {this.props.name}</h1>; } }} const element = <Welcome name="World!" />; ReactDOM.render( element, document.getElementById('root'));

How to create a simple component in React?Option 1:class HelloMessage { render() { return ( <div> Hello {this.props.name} </div> ); }}ReactDOM.render( <HelloMessage name="Taylor" />, document.getElementById('hello-example'));Option 2:class HelloMessage extends React.Component { return() { render ( <div> Hello {this.props.name} </div> ); }}ReactDOM.render( <HelloMessage name="Taylor" />, document.getElementById('hello-example'));Option 3:class HelloMessage extends React.Component { render() { return ( <div> Hello {this.props.name} </div> ); }}ReactDOM.render( <HelloMessage name="Taylor" />, document.getElementById('hello-example'));Option 4:class HelloMessage extends React.Component { return ( <div> Hello {this.props.name} </div> );}ReactDOM.render( <HelloMessage name="Taylor" />, document.getElementById('hello-example'));

Observe the below given JavaScript code and predict the JSX equivalent syntax from the given options. const App = () => { return React.createElement("div", null, React.createElement ("h1", {}, "Hello World"), React.createElement("p", null)); } export default App; < div> < h1> Hello World < /h1> < p>null< /p> < /div> < div> < h1> Hello World < /h1> < p> < /p> < /div> < div>null < h1> Hello World < /h1> < p > null< /p> < /div> < div null> < h1> Hello World < /h1> < p null > < /p> < /div>

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