Sass CSS Extensions

CSS Extensions can be used to enhance the functionality of the web pages. The following table lists down some of the CSS extensions used in SASS:

CSS Extension	Description
Nested Rules	It is a way of combining multiple CSS rules within one another.
Referencing Parent Selectors	It is the process of selecting parent selector by using the & character.
Nested Properties	It allows nesting of properties into other properties which leads to grouping of another related code.
Placeholder Selectors	Sass supports placeholder selector using class or id selector by making use of @extend directive.