When a server sends a file, it usually sends raw binary data. In JavaScript, we represent this as a Blob (Binary Large Object). To trigger a download in the browser, we create a temporary URL for that Blob and "click" a hidden link. Implementation with Axios

For large files, users need feedback. Axios makes this easy with the onDownloadProgress callback. javascript

const contentDisposition = response.headers['content-disposition']; let fileName = 'default-file.dat'; if (contentDisposition) { const fileNameMatch = contentDisposition.match(/filename="(.+)"/); if (fileNameMatch.length === 2) fileName = fileNameMatch[1]; } Use code with caution. Implementation with Fetch API

Axios is the most popular HTTP client for Vue. The key is setting the responseType to blob . javascript

Hardcoding filenames is rarely ideal. Most backends send a Content-Disposition header containing the filename. To access this in Axios: