NPM Module's CSS not applied using #vue/web-component-wrapper VueJS Webcomponents - vue.js

Question

While developing a Vue web component, using #vue/web-component-wrapper, the styles of npm_modules are not applied. The css actually isn't loaded at all.
Here is my main.js:
import Vue from 'vue';
import wrap from '#vue/web-component-wrapper';
import App from './App.vue';
import '#/modules/filters';
import '#fortawesome/fontawesome-free/css/all.css';
import '#fortawesome/fontawesome-free/js/all';
const wrappedElement = wrap(Vue, App);
window.customElements.define('hello-there', wrappedElement);
Before that, I had the problem, that even my normal css wasn't applied. I resolved this, by help of the answer of this question: Styling not applied to vue web component during development
Even those imported styles in main.js:
import '#fortawesome/fontawesome-free/css/all.css';
won't load at all.
First thought -> there is something wrong with the webpack css-loader/vue-style-loader
Here is my vue.config.js (using the workaround from the above mentioned question):
function enableShadowCss(config) {
const configs = [
config.module.rule('vue').use('vue-loader'),
config.module.rule('css').oneOf('vue-modules').use('vue-style-loader'),
config.module.rule('css').oneOf('vue').use('vue-style-loader'),
config.module.rule('css').oneOf('normal-modules').use('vue-style-loader'),
config.module.rule('css').oneOf('normal').use('vue-style-loader'),
config.module.rule('postcss').oneOf('vue-modules').use('vue-style-loader'),
config.module.rule('postcss').oneOf('vue').use('vue-style-loader'),
config.module.rule('postcss').oneOf('normal-modules').use('vue-style-loader'),
config.module.rule('postcss').oneOf('normal').use('vue-style-loader'),
config.module.rule('scss').oneOf('vue-modules').use('vue-style-loader'),
config.module.rule('scss').oneOf('vue').use('vue-style-loader'),
config.module.rule('scss').oneOf('normal-modules').use('vue-style-loader'),
config.module.rule('scss').oneOf('normal').use('vue-style-loader'),
config.module.rule('sass').oneOf('vue-modules').use('vue-style-loader'),
config.module.rule('sass').oneOf('vue').use('vue-style-loader'),
config.module.rule('sass').oneOf('normal-modules').use('vue-style-loader'),
config.module.rule('sass').oneOf('normal').use('vue-style-loader'),
config.module.rule('less').oneOf('vue-modules').use('vue-style-loader'),
config.module.rule('less').oneOf('vue').use('vue-style-loader'),
config.module.rule('less').oneOf('normal-modules').use('vue-style-loader'),
config.module.rule('less').oneOf('normal').use('vue-style-loader'),
config.module.rule('stylus').oneOf('vue-modules').use('vue-style-loader'),
config.module.rule('stylus').oneOf('vue').use('vue-style-loader'),
config.module.rule('stylus').oneOf('normal-modules').use('vue-style-loader'),
config.module.rule('stylus').oneOf('normal').use('vue-style-loader'),
];
configs.forEach((c) =>
c.tap((options) => {
options.shadowMode = true;
return options;
})
);
}
module.exports = {
chainWebpack: (config) => {
enableShadowCss(config);
},
configureWebpack: {
output: {
libraryExport: 'default',
},
resolve: {
symlinks: false,
},
module: {
rules: [
{
test: /\.ya?ml$/,
use: 'raw-loader',
sideEffects: true,
},
],
},
},
css: {
extract: false,
loaderOptions: {
sass: {
additionalData: `#import "#/styles/_variables.scss";`,
},
},
},
};
So I tried to add css-loader/vue-style-loader manually to webpack with:
chainWebpack: (config) => {
enableShadowCss(config);
config.module
.rule('css')
.test(/\.css$/)
.use('css-loader')
.loader('css-loader')
.end();
},
maybe those styles load now, but it throws an syntax error whilst building anyways:
./node_modules/#fortawesome/fontawesome-free/css/all.css
Syntax Error: CssSyntaxError
(1:4) /Users/.../node_modules/#fortawesome/fontawesome-free/css/all.css Unknown word
> 1 | // style-loader: Adds some css to the DOM by adding a <style> tag
| ^
2 |
3 | // load the styles
I know I know, seems obvious but those lines don't appear in the file at all. Maybe in an imported file though.
Without using the wc-wrapper everything works fine!!
Well anyways... no clue what I should try next. I am a newbie to webpack and Vue!
If anybody has an idea I would greatly appreciate it!
Cheers