Issue: 2997

extractCSS - no plugins CSS on prod build

[issue link]

I have a lot of shared SASS code on assets directory and would like to use extractCSS for build option. Tested and works… but not completely - there are no CSS styles for plugins that I use in app. In this case, from vue-js-modal. I use this plugin in config:

{ src: '~/plugins/vue-js-modal', ssr: true },

What should I change to fix it?

This question is available on Nuxt.js community (#c2597)