1. Variables
Variables allow you to store values that can be reused throughout your stylesheets.
SCSS
Using Variables in SCSS
2. Nesting
4. Partials and Imports
Partials allow you to break your CSS into smaller, more manageable pieces. These pieces can be imported into other SCSS files.
SCSS
5. Inheritance with @extend
The @extend directive allows one selector to inherit the styles of another.
SCSS
Putting It All Together in an SPFx Component
ExampleComponent.module.scss
ExampleComponent.tsx