Create a react or js library, first open terminal and excess you folder using cd .......... and create a react app using  create-react-app ...........(name it) like as myapp

App.js

import React, { useState } from "react";

function App() {
  const [ticketNumber, setticketNumber] = useState(0);
  const [seatNumber, setseatNumber] = useState(0);

  function handleticketNumberset(event) {
    setticketNumber(event.target.value);
  }

  function handleseatNumberset(event) {
    setseatNumber(event.target.value);
  }

  return (
    <div className = "App">

      <input
        type="text"
        value={ticketNumber}
        onChange={handleticketNumberset}
        placeholder="Enter Ticket Number"
      />
      <h2>Ticket Number : {ticketNumber} </h2>

      <input
      type="text"
      value={seatNumber}
      onChange={handleseatNumberset}
      placeholder="Enter Seat Number"
      />
      <h2>Seat Number : {seatNumber} </h2>
    </div>
  );
   
 
}

export default App;


index.js

import React from 'react';
import ReactDOM from 'react-dom/client';
import App from './App';


const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>
);


Excess folder 

PS C:\Users\User\Documents\react_ticket> cd ticket

PS C:\Users\User\Documents\react_ticket\ticket>



npm run start to run your code in terminal


Compiled successfully!


You can now view ticket in the browser.


  Local:            http://localhost:3000

  On Your Network:  http://192.168.56.1:3000


Note that the development build is not optimized.

To create a production build, use npm run build.


webpack compiled successfully



Result