Felix-Kyun

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];
if (!/^blob:/.test(img.src)) {
continue ;
}
let canvasElement = document.createElement( 'canvas' );

Felix-Kyun

const toInt = (str) => str - "0";

function factorial(num) {
	num = trimLeadingZero(num);
	if (num === "0" || num === "1") return "1";

	return stringMultiply(num, factorial(stringSubtract(num, 1)));
}

function trimLeadingZero(num) {