JavaScript: Receive as File Object via URL

I think you want to do something by getting a pdf from your browser...

async function downloadPDF() {
    // Must be held in the form of a blob.
    const res = await fetch('pdf_link.pdf');
    const blob = await res.blob();

    // How to download via anchor tag
    const link = document.createElement('a');
    link.href = URL.createObjectURL(blob);
    link.download = 'something.pdf';
    link.innerHTML = 'download';
    document.body.appendChild(link);
}

downloadPDF();

It works with the above code I've tried.

However, only pdf in situations where CORS is allowed can be blob.

Most pdf links on the web where we can find a search are probably impossible because this is not allowed.

Eventually, I have to proxy the link from the server I created and download a pdf that added a CORS permit header.

If this is the case, it would be better to program and receive and process the server from that server.