How to download view only protected PDF from Google Drive (JS code)?

download-pdf.js

// https://codingcat.codes/2019/01/09/download-view-protected-pdf-google-drive-js-code/
// https://www.linkedin.com/in/ronnie-joshua/

// 1. Open the presentation
// 2. Click three times on zoom to enlarge the presentation
// 3. Scroll down slowly to the last page [Let the entire document load that's the idea]
// 4. Then go to the developer console and run this script
// 5. Check the results. if not okay then adjust width and length line of the code

// Landscape PDF
// With 3 clicks on Zoom
let jspdf = document.createElement("script");
jspdf.onload = function () {
    // [297 * 3.75, 210 * 3] [Width * Length]
    let pdf = new jsPDF('l', 'mm', [297 * 3.75, 210 * 3]);
    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);