Sass/SCSS

Missing import  

Reports a reference to a variable, mixin, or function that is declared in another file but this file isn't explicitly imported in the current file.

Unresolved mixin  

Reports an unresolved Sass/SCSS mixin reference.

Unresolved placeholder selector  

Reports an unresolved Sass/SCSS placeholder selector reference.

Unresolved variable  

Reports an unresolved Sass/SCSS variable reference.