i am not sure about your requirement but hope this will help you

first you need to fetch the file using a fetch call inside a async function

response = await fetch(url);

then after that you will be able to get a reader from the response const reader = response.body.getReader();

you can track the fetch by measuring the progress for that store the total file size

const contentLength = +response.headers.get('Content-Length');

in ordre to track the recieved bytes let receivedLength = 0;

to store the chunks recieved

let chunks = []; // array of received binary chunks (comprises the body)

after that do a while loop which will run endlessly

while(true) {
          const {done, value} = await reader.read();

          if (done) {
            break;
          }

          chunks.push(value);
          receivedLength += value.length;
            
          let compleated = Math.round(receivedLength/contentLength*100);

          console.log(`Received ${receivedLength} of ${contentLength}`)
        }

 after the while loop has broken you can check if the transfer is fully completed or not

then you can create a blob from the array which we stored our chunks of data

let blob = new Blob(chunks);

then you can use this blob