Learn SASS to create dynamic, reusable styles and efficiently manage and migrate CSS projects.

Web Page Styling—CSS

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 who’s created a website knows that CSS is hard. In this module, we’ll learn how to use nesting, variables, mixins, partials, functions, and more to write dynamic and reusable styles of code. We’ll also learn the various methods to structure our projects and bring organization to our stylesheets. By the end of this module, we’ll have advanced knowledge of SASS. We’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 Front-End 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.

Placeholders

For Example: