Calculate percentage using content-length header.
The filename is sent in the Content-Disposition header. download file with fetch react
Downloading files in a modern React application often requires more than a simple anchor tag, especially when dealing with authentication headers or large blobs. Using the Fetch API provides the control needed to handle these complex scenarios. Calculate percentage using content-length header
The server requires a body to generate the file. Using the Fetch API provides the control needed
const downloadFile = async (url, filename) => try const response = await fetch(url, method: 'GET', headers: 'Authorization': 'Bearer YOUR_TOKEN_HERE', , ); if (!response.ok) throw new Error('Download failed'); // Convert the response to a Blob const blob = await response.blob(); // Create a local URL for the Blob const downloadUrl = window.URL.createObjectURL(blob); // Create a hidden anchor element const link = document.createElement('a'); link.href = downloadUrl; link.setAttribute('download', filename); // Set the file name // Append to the body, click it, and remove it document.body.appendChild(link); link.click(); link.parentNode.removeChild(link); // Clean up the URL object window.URL.revokeObjectURL(downloadUrl); catch (error) console.error('Error downloading file:', error); ; Use code with caution. 2. Creating a Reusable React Component
To start, you need a function that performs the request and processes the response. javascript
You need to check if the user has permission before the browser starts the download. 5. Common Pitfalls