React Js Pie Chart

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8" />
  <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.development.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.development.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/chart.js@2.9.4"></script>
</head>
<body>
  <div id="app"></div>
  <script type="text/babel">
    const { useRef, useEffect } = React;
    function App() {
      const chartRef = useRef(null);

useEffect(() => {
        const companies = [
          { name: 'Amazon', valuation: 1900 },
          { name: 'Tesla', valuation: 800 },
          { name: 'Alphabet', valuation: 1500 },
          { name: 'Meta Platforms', valuation: 900 },
          { name: 'Walmart', valuation: 400 },

];

const ctx = chartRef.current.getContext('2d');

const data = {
          labels: companies.map(company => company.name),
          datasets: [{
            data: companies.map(company => company.valuation),
            backgroundColor: [
              'red',
              'blue',
              'green',
              'orange',
              'purple',

],
          }],
        };

new Chart(ctx, {
          type: 'pie',
          data: data,
        });
      }, []);

return (
        <div className='container'>
          <h3>React Js Pie Chart </h3>
          <canvas ref={chartRef}></canvas>
        </div>
      );
    }

ReactDOM.render(<App />, document.getElementById("app"));
  </script>
  <style>
    .container {
      max-width: 500px;
      margin: 0 auto;
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
  </style>
</body>

</html>