September 2020
Beginner
432 pages
9h 24m
English
Content preview from HTML and CSS: Visual QuickStart Guide, 9th Edition
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CSS Preprocessors
CSS includes functions that make writing rulesets easier, but there are even more powerful tools that can streamline and optimize your CSS code.
These tools are called CSS preprocessors, and they operate at a level above CSS. That is, they take what you write and convert it to CSS. Preprocessors add features that otherwise wouldn’t exist in CSS, the ability to reuse rulesets easily without copying and pasting, and loops (a way to automatically write code based on a set of criteria). Let’s take a closer look.
How CSS Preprocessors Work
A CSS preprocessor is essentially a programming language that produces valid CSS. You write ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.