youtube_collection/youtube_collection_web/src/App.js

import './App.css';
import { Link, Route, Routes, useNavigate } from 'react-router-dom';
import Home from './components/Home';
import { Button } from 'antd';


const Categories = () => (
  <div>
    <h2>Categories</h2>
    <p>Browse items by category.</p>
  </div>
);

function App() {
  const navigate = useNavigate();
  const a = 1;
  function GoHome(){
    alert("go home")
    navigate('/home?a=' + a)
  }
  return (
    <div className="App">
      <div>
        <br></br>
        <Link to="/home">Home</Link>
        <Link to="/categories">categories</Link>
        <Button type="primary" onClick={() => GoHome}>GO HOME</Button>
      </div>
      <Routes>
        <Route path="/home" element={<Home />} />
        <Route path="/categories" element={<Categories />} />
      </Routes>
    </div>
  );
}


export default App;