React Js Add Timestamp to filename before image upload

<!DOCTYPE html>
<html>

</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    const { useState } = React;

function App() {
     const [selectedFile, setSelectedFile] = useState(null);

const handleFileChange = (event) => {
        const file = event.target.files[0];
        setSelectedFile(file);
      };

const uploadFile = () => {
        if (selectedFile) {
          const timestamp = Date.now();
          const fileName = `${timestamp}_${selectedFile.name}`;

// Here, you can perform your file upload logic, for example using a server-side API or a third-party library.
          // Replace the following line with your actual upload logic.

console.log('Uploading file with the new filename:', fileName);
          alert('added timestamp to filename')
        } else {
          alert('Please select a file first.');
        }
      };

return (
        <div className='container'>
          <h3>React Js Add Timestamp To Filename Before Image Upload</h3>
          <input type="file" onChange={handleFileChange} />
          <button onClick={uploadFile}>Upload</button>
        </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;

}

/* Styles for the upload button */
    .container button {
      margin-top: 10px;
      padding: 10px 20px;
      background-color: #007BFF;
      color: white;
      border: none;
      border-radius: 5px;
      cursor: pointer;
      transition: background-color 0.3s ease;
    }

.container button:hover {
      background-color: #0056b3;
    }

</style>
</body>

</html>