React Query Download File — ((top))

const downloadFile = async (fileId) => { const response = await axios.get(`/api/files/${fileId}`, { responseType: 'blob', // Critical for binary data }); return response.data; }; Use code with caution. 2. Create the Download Hook

The standard approach involves fetching the data as a , creating a temporary URL, and triggering a programmatic click on a hidden anchor element. 1. Define the Fetch Function react query download file

Wrap the fetch logic in a useMutation to handle the side effect of saving the file to the user's device. Download Blob with React Query, createObjectURL error const downloadFile = async (fileId) => { const

Implementing file downloads with (now TanStack Query) allows you to manage loading states, handle errors, and even track download progress while maintaining a clean, declarative codebase. Using axios or fetch , ensure the response

Using axios or fetch , ensure the response type is set to blob . javascript

Use this if the file data is used for both display (e.g., an inline PDF preview) and download. Set enabled: false to prevent the download from triggering automatically when the component mounts. Implementation Guide: Downloading a File

Ideal for "one-off" actions like clicking a "Download Report" button. Mutations are imperative, meaning you trigger them only when needed, and they don't cache binary data by default—saving memory.