LESS and SASS

SASS and LESS are CSS pre-processors.

What is a CSS pre-processor?

A pre-processor is a program that processes its input data to produce output that is used as input to another program.

A CSS pre-processor will allow writing clean CSS in a programming construct instead of static rules and it will output the result in clean CSS.

Advantages include: variablesnestingmixinsoperators and
functions.

Guru Chris Coyier writes about SASS vs. LESS and general musings on pre-processors on CSS-tricks.com.

Udemy also compares LESS and SASS.

Google provides a few notes about DevTools and working with CSS pre-processors.

For the cons of using pre-processors, check out Miller Medeiros‘ blog post.

Finally, here’s an epic YouTube Playlist on SASS related topics:

Sass styleguides

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