No, no, Java is old and slow. Let's compile typescript to javascript, write the user interface in React and HTML (with some parts hidden in CSS files with some selector and expression magic to make it more fun), and WebAssembly for the performance critical stuff. Easy-peasy.
Why would you not want to make your application's build process dependent on a dozen plugins that will no longer be compatible with each other in the next version? Are you even a real programmer? /s