React Js Convert File Size to MB

<!DOCTYPE html>
<html>

return (
        <div className='container'>
          <h3>React Js Convert File Size to KB</h3>
          <input type="file" onChange={handleFileInputChange} />
          <div>
            <p className='file-size '>File Size in Bytes: {fileSizeInBytes} bytes</p>
            <p className='file-size '>File Size in KB: {fileSizeInKB.toFixed(2)} KB</p>
          </div>
        </div>
      );
    }

ReactDOM.render(<App />, document.getElementById("app"));
  </script>

.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;
    }

/* Style the file size text */
    .file-size {
      margin-top: 10px;
      font-size: 14px;
      color: #555;
    }
  </style>
</body>

</html>

 
<!DOCTYPE html>
<html>
​
<head>
  <meta charset="UTF-8" />
</head>
​
<body>
  <div id="app"></div>
  <script src="https://unpkg.com/react@17.0.2/umd/react.development.js"></script>
  <script src="https://unpkg.com/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 type="text/babel">
    const { useState } = React;
    function App() {
      const [fileSizeInBytes, setFileSizeInBytes] = useState(0);
      const [fileSizeInKB, setFileSizeInKB] = useState(0);
​
      const handleFileInputChange = (e) => {
        const file = e.target.files[0];
        if (file) {
          const fileSizeBytes = file.size;
          const fileSizeKB = fileSizeBytes / 1024; // Convert to KB
          setFileSizeInBytes(fileSizeBytes);
          setFileSizeInKB(fileSizeKB);
        } else {
          setFileSizeInBytes(0);
          setFileSizeInKB(0);
        }
      };
​
      return (
        <div className='container'>
          <h3>React Js Convert File Size to KB</h3>
          <input type="file" onChange={handleFileInputChange} />
          <div>
            <p className='file-size '>File Size in Bytes: {fileSizeInBytes} bytes</p>
            <p className='file-size '>File Size in KB: {fileSizeInKB.toFixed(2)} KB</p>
          </div>
        </div>
      );
    }
​
    ReactDOM.render(<App />, document.getElementById("app"));
  </script>
​
  <style>
    * {
      box-sizing: border-box;
    }
​
    .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;
    }
​
    /* Style the file size text */
    .file-size {
      margin-top: 10px;
      font-size: 14px;
      color: #555;
    }
  </style>
</body>
​
</html>