React Js Display/Show Text for few Seconds

<!DOCTYPE html>
<html>
  <head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.14.0/umd/react.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.14.0/umd/react-dom.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
  </head>
  <body>
    <div id="app"></div>
    <script type="text/babel">
      const { useState, useEffect } = React;

function App() {
        const [isVisible, setIsVisible] = useState(true);

useEffect(() => {
          const timer = setTimeout(() => {
            setIsVisible(false);
          }, 3000);

return () => clearTimeout(timer);
        }, []);

return (
          <div className="container">
            <h1 className="title">Welcome to Font Awesomer Icons</h1>
            <h3>React Js show/display text for few seconds</h3>
            {isVisible && (
              <div className="hidden-text">
                This text will hide in 3 seconds
              </div>
            )}
          </div>
        );
      }

ReactDOM.render(<App />, document.getElementById("app"));
    </script>
    <style>
      .container {
        margin: 0 auto;
        width: 500px;
        text-align: center;
        box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12),
          0 2px 4px 0 rgba(0, 0, 0, 0.24);
        padding: 20px;
        display: flex;
        flex-direction: column;
        align-items: center;
        height: 100vh;
      }

.title {
        color: #333;
        font-size: 24px;
        font-weight: bold;
        text-align: center;
        margin-bottom: 20px;
      }

.hidden-text {
        background-color: #e0e0e0;
        color: #555;
        font-size: 16px;
        padding: 10px;
        border-radius: 5px;
        text-align: center;
        margin-top: 20px;
        opacity: 1;
        animation: hideText 3s ease-in forwards;
      }

@keyframes hideText {
        0% {
          opacity: 1;
        }
        100% {
          opacity: 0;
        }
      }
    </style>
  </body>
</html>