React Js Convert File Size to MB

React Js Convert File Size to MB:In React.js, converting file size to MB (megabytes) and KB (kilobytes) involves simple calculations using JavaScript. First, obtain the file size in bytes. To convert it to MB, divide by 1024*1024, and to convert it to KB, divide by 1024. Using React's state management, you can update the component's state with the calculated values.

written

reviewed

updated

How can I convert a file size in React js from bytes to megabytes (MB)?

This ReactJS code snippet creates a simple file input component that allows users to select a file. When a file is selected, it calculates and displays both the file size in bytes and the file size in megabytes (MB). It uses the useState hook to manage and update the state of these values. When a file is selected, the handleFileInputChange function is triggered, which reads the file's size in bytes, converts it to MB, and updates the state accordingly. The results are then displayed in the HTML using JSX. Finally, the component is rendered into the HTML document.

React Js Convert File Size to MB Example

  <script type="text/babel">
    const { useState } = React;
    function App() {
      const [fileSizeInBytes, setFileSizeInBytes] = useState(0);
      const [fileSizeInMB, setFileSizeInMB] = useState(0);

      const handleFileInputChange = (e) => {
        const file = e.target.files[0];
        if (file) {
          const fileSizeBytes = file.size;
          const fileSizeMB = fileSizeBytes / (1024 * 1024); // Convert to MB
          setFileSizeInBytes(fileSizeBytes);
          setFileSizeInMB(fileSizeMB);
        } else {
          setFileSizeInBytes(0);
          setFileSizeInMB(0);
        }
      };

      return (
        <div className='container'>
          <h3>React Js Convert File Size to MB </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 MB: {fileSizeInMB.toFixed(2)} MB</p>
          </div>
        </div>
      );
    }

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

Run

Output of File Size in MB

Pasted Image

How can I convert a file size in Reactjs from bytes to kilobytes (KB)?

This JavaScript code snippet uses React and the useState hook to create a simple web application. The App component renders a file input element that allows users to select a file. When a file is selected, an event handler (handleFileInputChange) is triggered. It calculates the file's size in bytes and converts it to kilobytes (KB), updating the state variables fileSizeInBytes and fileSizeInKB accordingly.

React Js Convert File Size to KB Example 2

  <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>

Run

Output of File Size in KB