When you generate a Document, PDFMonkey uses a Chrome-based web engine to render your content and then "prints" it to PDF.
This means that you can do anything that works in a mordern browser and it will work in PDFMonkey, with the exception of animations, of course.
The latest version of our engine is based on Chromium v86.0.4240.0. You can check if any web feature is available in the caniuse listing for Chrome 86.