How to prerender large jquery?

Question

Node.js

There is a landing page with a huge bloated jquery spa built with webpack and other ruinous excesses. In browser debugging tools, it is easy to see how sequential loading (through a promise polyfill) of these functions and library animations kills FPS and freezes the initial page load, which has a bad effect on Google audit and other metrics. Please share your experience of using the server prerender for such cases, if it is possible to implement it at all. I myself only used different ones for react ssr - everything is easily hydrated and loads quickly (this is vdom).