Critical css process

Hi guys,

I ‘m working on an universal Vue.js project where your great plugin is involved.
Currently, on my Webpack production build, CSS is extracted into chunks.

What I would like to perform is injecting into dom (inline I mean) critical CSS which could be determined as non-scoped CSS into the project.

Do you have any insights, advices or even exemples to help me achieve it ?

Thanks a lot for help.

VueSSR is involved in the project, not Nuxt directly.