text: import React from 'react';
  import logo from '../logo.svg';
  
  const Page1 = ({ onRouteChange }) => (
    <div className="App">
      <header className="App-header">
        <img src={logo} className="App-logo" alt="logo" />
        <h1 className="App-title">Welcome to React</h1>
      </header>
      <button className="disabled">Page1</button>
      <button onClick={() => onRouteChange('page2')}>Page2</button>
      <button onClick={() => onRouteChange('page3')}>Page3</button>
    </div>
  );
  
  export default Page1;
  