JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js"></script>
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8">
</head>
<body>
<button onclick="myfunc();">Button</button>
</body>

JavaScript

function myfunc() {

var { jsPDF } = window.jspdf;

var doc = new jsPDF();
doc.setFont(undefined, 'normal');
doc.text("Hello world! " + Date.now(), 10, 10);
doc.setFont(undefined, 'bold');
doc.text("Hello world! " + Date.now(), 10, 20);
doc.save("a4.pdf");
}