React Js Detect Internet Speed

<!DOCTYPE html>
<html>

<body>
  <div id="app"></div>
  <script type="text/babel">
    const { useState, useEffect } = React;
    function App() {
      const [isLoading, setIsLoading] = useState(true);
      const [connectionType, setConnectionType] = useState('');
      const [bandwidth, setBandwidth] = useState('');

useEffect(() => {
        const fetchData = async () => {
          try {
            if (navigator.connection) {
              await navigator.connection.ready;
              setConnectionType(navigator.connection.effectiveType);
              setBandwidth(navigator.connection.downlink.toFixed(2));
              setIsLoading(false);
            } else {
              setConnectionType('Unknown');
              setBandwidth('N/A');
              setIsLoading(false);
            }
          } catch (error) {
            console.error('Error fetching data:', error);
          }
        };

fetchData();
      }, []);

return (
        <div className='container'>
          <h3 className='title'>React Check Internet Speed</h3>
          {isLoading ? (
            <p className='loading'>Loading...</p>
          ) : (
            <p className={`connection-info ${connectionType === '4g' || connectionType === '5g' || bandwidth >= 10 ? 'fast' : 'slow'}`}>
              {connectionType === '4g' || connectionType === '5g' || bandwidth >= 10 ? (
                `You are on a fast ${connectionType} connection (${bandwidth} Mbps).`
              ) : connectionType === '2g' || connectionType === '3g' || bandwidth < 1 ? (
                `You are on a slow ${connectionType} connection (${bandwidth} Mbps).`
              ) : (
                `Your internet connection is ${connectionType} (${bandwidth} Mbps).`
              )}
            </p>
          )}
        </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;
    }

/* Title Styles */
    .title {
      font-size: 24px;
      color: #333;
      margin-bottom: 20px;
    }

/* Loading Styles */
    .loading {
      font-size: 18px;
      color: #777;
    }

/* Connection Info Styles */
    .connection-info {
      font-size: 18px;
      margin-top: 20px;
      padding: 10px;
      border-radius: 5px;
    }

/* Fast Connection Styles */
    .fast {
      background-color: #4caf50;
      /* Green */
      color: #fff;
    }

/* Slow Connection Styles */
    .slow {
      background-color: #f44336;
      /* Red */
      color: #fff;
    }
  </style>
</body>

</html>