Sass global variables and mixins not working - vue.js

Question

I've set up a project using Vue 3.2.33 and Vite 2.9.5
When I try to access any global variable or mixin from within any vue component, I get an undefined error. This problem doesn't occur in scss files.
The import itself seems working correctly because any css rules in it are working.
vite.config.ts:
import { fileURLToPath, URL } from 'url';
import { defineConfig } from 'vite';
import vue from '#vitejs/plugin-vue';
// https://vitejs.dev/config/
export default defineConfig({
plugins: [vue()],
resolve: {
alias: {
'#': fileURLToPath(new URL('./src', import.meta.url)),
},
},
css: {
preprocessorOptions: {
scss: {
additionalData: '#use "#/styles/variables";',
},
},
},
});
src/styles/_variables.scss:
// breakpoints
$breakpoints: (
"sm": 576px,
"md": 768px,
"lg": 992px,
"xl": 1200px,
"xxl": 1400px,
);
#mixin test {
border: 3px solid red;
}
Example use:
<style scoped lang="scss">
#use 'sass:map';
.container {
max-width: 100%;
width: 100%;
margin: 0 auto;
#include test; // <- undefined
&--fluid {
max-width: 100%;
width: 100%;
}
}
$widths: (
'sm': 540px,
'md': 720px,
'lg': 960px,
'xl': 1140px,
'xxl': 1320px,
);
#each $breakpoint, $width in $widths {
#media (min-width: map.get($breakpoints, $breakpoint)) { // <- $breakpoints undefined
.container {
max-width: $width;
}
}
}
</style>

Answer 1

use
#import
in your vite config instead of
#use
vite.config.ts:
export default defineConfig({
plugins: [vue()],
css: {
preprocessorOptions: {
scss: {
additionalData: '#import "./src/styles/variables.scss";',
},
},
},
});
keep in mind that you cannot import the same file variables.scss again in your main.ts file otherwise, you will get this error
[sass] This file is already being loaded.
by the way, you can also import the scss file in every single component manually as you mentioned but that would be really tedious so using a global import in preprocessorOptions in vite.config.ts is a much better option for files used globally like a variables.scss file.

Answer 2

I've managed to "fix" the issue. Turns out, when I replace all #use rules for file imports, the sass code is imported correctly and works. But this produces a new problem as the #import rules cannot be placed before #use, so I had to remove the additionalData key from config and include the imports manually.