Check out example codes for "vue add sass". It will help you in understanding the concepts better.

Code Example 1

npm install sass-loader node-sass style-loader --save-dev

Code Example 2

<style lang="scss">
/* write SCSS here */
</style>

Code Example 3

<!--
# Run this command in the root dir of your vue project:
npm i sass-loader node-sass style-loader
-->

<!-- And later in your vue component -->
<style lang="sass">
/* Your sass code */
</style>

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