Gain insights into Sass for CSS, exploring nesting, variables, mixins, and more. Discover methods to structure projects and write dynamic, reusable styles for advanced frontend development.

SASS (Syntactically Awesome Style Sheets) is a scripting language known as a CSS preprocessor. CSS preprocessors are compiled into CSS and by doing so, extend the default capabilities of CSS.

Sass makes authoring stylesheets faster, easier, and more flexible. It’s a welcome helper in the world of web design, because anyone that’s created a website knows that CSS is hard.

In this course, you will learn how to use nesting, variables, mixins, partials, functions and more to write dynamic and reusable styles of code. You’ll also learn the various methods to structure your projects and bring organization to your stylesheets.

By the end of this course, you’ll have advanced knowledge of SASS. You’ll be able to migrate an existing CSS codebase, as well as set up an entire project (and build process) from scratch.

Sass for CSS: Advanced Frontend Development

# For Example:
In SASS a **placeholder** looks and acts a lot like a class selector, only it starts with a ```%``` and it's not included in the CSS output. 

Our ```%placeholder``` selector contains some  width and height declarations:

```SASS
%placeholder {
    width: 100%;
    height: 100%;
}
body {
    @extend %placeholder;
}
p {
    @extend %placeholder;
}
```
Note that we've used the ```@extend``` directive, which (as we saw previously) allows one selector to inherit styles of another selector. 

This outputs to CSS as follows:

```CSS
body, p {
    width: 100%;
    height: 100%;
}
```
Simple and as expected!

However, the preprocessor will skip ```%placeholder``` and it won't be included in the final CSS file.



In this lesson, we'll be looking at SASS placeholders.

Starting with SASS

SASS Features

Structuring your SASS Projects

Setting up a SASS Build Process

Bonus: Setting up Media Queries with SASS Mixins

Appendix

Placeholders

For Example: #