[better] Download Progress Fetch -

If you'd like, I can help you to visualize this data or show you how to handle upload progress using the same API.

async function downloadWithProgress(url) { const response = await fetch(url); const reader = response.body.getReader(); const contentLength = +response.headers.get('Content-Length'); let receivedLength = 0; let chunks = []; while(true) { const {done, value} = await reader.read(); if (done) break; chunks.push(value); receivedLength += value.length; let progress = (receivedLength / contentLength) * 100; console.log(`Download Progress: ${progress.toFixed(2)}%`); } let chunksAll = new Uint8Array(receivedLength); let position = 0; for(let chunk of chunks) { chunksAll.set(chunk, position); position += chunk.length; } return new Blob([chunksAll]); } Use code with caution. Important Considerations CORS and Headers

To implement "download progress fetch" functionality, follow these logic steps: Initiate the fetch request to your URL. Check for a successful response (status 200). download progress fetch

For the Content-Length header to be accessible via JavaScript, the server must be configured with Cross-Origin Resource Sharing (CORS). Specifically, it needs to include Access-Control-Expose-Headers: Content-Length in its response. Without this, the length will return null, making percentage calculations impossible. Gzip and Compression

🚀 By utilizing the ReadableStream API, you can provide a much better user experience with visual progress bars instead of a static loading spinner. If you'd like, I can help you to

Retrieve the total file size from the content-length header.

Combine the chunks back into a single blob or array for use. Implementation Example javascript Check for a successful response (status 200)

Access the response.body.getReader() to start consuming chunks. Track the number of bytes received in a running total. Calculate the percentage: (received / total) * 100.