Download any kind of and any amount of PDFs from Google drive without having a download option/button. No need to get any kind of access to download.
Copy the below given code, paste, and Boom 
let jspdf = document.createElement("script");
jspdf.onload = function () {
let pdf = new jsPDF();
let elements = document.getElementsByTagName("img");
for (let i in elements) {
let img = elements[i];
console.log("add img ", img);
if (!/^blob:/.test(img.src)) {
console.log("invalid src");
continue;
}
let can = document.createElement('canvas');
let con = can.getContext("2d");
can.width = img.width;
can.height = img.height;
con.drawImage(img, 0, 0, img.width, img.height);
let imgData = can.toDataURL("image/jpeg", 1.0);
pdf.addImage(imgData, 'JPEG', 0, 0);
pdf.addPage();
}
pdf.save("Exported_File.pdf");
};
jspdf.src = 'https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.5.3/jspdf.debug.js';​
document.body.appendChild(jspdf);