!!install!! | Download File With Rtk Query

Downloading files with requires a slightly different approach than standard JSON data fetching. Because RTK Query is primarily a caching layer, storing large binary files (like PDFs or Excel sheets) in the Redux store can lead to high memory usage or browser crashes.

: While you can use builder.query , it is often better to use builder.mutation for file downloads. Mutations are not automatically cached, preventing the "clogging" of Redux state that often happens when storing large binary files. download file with rtk query

// DownloadButton.tsx import useDownloadFileMutation from './apiSlice'; const DownloadButton = ( fileId, fileName ) => const [downloadFile, isLoading ] = useDownloadFileMutation(); const handleDownload = async () => try 'downloaded-file'); // 4. Trigger the download document.body.appendChild(link); link.click(); // 5. Cleanup link.parentNode?.removeChild(link); window.URL.revokeObjectURL(url); catch (error) console.error('Download failed:', error); ; return ( isLoading ? 'Downloading...' : 'Download File' ); ; Use code with caution. Key Considerations Cleanup link

: For more complex download scenarios (e.g., progress bars, large files), you might consider using the FileSaver.js library alongside RTK Query. how to use rtk-query download file · Issue #1522 - GitHub catch (error) console.error('Download failed:'

Once the data is fetched as a Blob , you need to create a temporary URL and trigger a hidden link to start the download.