Bookmarklet - download all PDFs in links on a page

download_pdfs.js

javascript:(() => {
  const items = document.querySelectorAll('a');
  let delay = 0;
  for (let index = 0; index < items.length; index++) {
    const item = items[index];
    if (item.getAttribute('href') != null && item.getAttribute('href').endsWith('.pdf')){
        /* only write last part of link to download element (filename) */
		    var downloadUri = item.getAttribute('href');
		    var n = downloadUri.lastIndexOf('/');
		    var result = downloadUri.substring(n + 1);
    	  item.setAttribute('download', result);
    	  setTimeout(() => item.click(), delay);
    	  delay += 500;
    }
  }
})();