Actually everything is done after this. This is the way I am building a huge SaaS project. Of course it downloads some code, or would you argue that using Javas

Actually everything is done after this. This is the way I am building a huge SaaS project. Of course it downloads some code, or would you argue that using Javascript is not simple because it needs to run in a browser? Server rendering is trivial to set up with Parcel, but I don't see the point of your remark - you don't have any option of server side rendering with Jquery.