Once upon a time…
…there was Sass. Sass was (is) an extension of CSS3, adding in nested rules, variables, mixins, selector inheritance, and all the features that CSS lacked. Its format was indented syntax, which was inspired by Haml’s syntax. Indentations specified blocks instead of brackets and semicolons, CSS was pronounced more readable, and everyone rejoiced. Well, not everyone. Sass detractors objected, stating that indented syntax was too foreign to CSS. And so, version 3 of Sass was born: SCSS. SCSS was a superset of CSS3; using brackets and semicolons, just like CSS. It was white-space agnostic. In the end, SCSS contained all that was well with the original iteration of Sass, minus the opinionated syntax, and there was again peace in the land.
Where my loyalties lie
I was an early adopter of Sass. Already familiar with Haml, I was developing my blog in Ruby at the time and enjoyed the brevity of syntax and runtime compilation using various gems. But I had my frustrations; namely, I couldn’t mix Sass and SCSS syntaxes, and I wasn’t a huge fan of the SCSS syntax of declaring mixins. I liked the idea of the old Sass syntax, with the option of falling back on regular CSS if necessary. Stylus seemed like the perfect match for me.
Enter Stylus: the once and future king
Stylus is a relative newbie to the CSS Preprocessor game, but it’s quite elegant. It can mix and match syntaxes, there’s no weird syntax for mixins, mixins are transparent, and there are in-language functions to make things like loops or conditional classes easier. It has all of the features that I was looking for in Sass and more. “But what about Compass?!” Sass-vocates cry. Well, Stylus has nib, which is a small and powerful library that provides powerful CSS3 mixins in the *.styl of Compass (this is a pun which I am stretching hard for; .styl is the stylus extension for the uninitiated). If you’re using Stylus as part of your middleware stack for NodeJS development, there is also the added benefit of automatically including the data URI of an image for embedding images in CSS. See this post for details on that one (scroll down to “Never use a sprite again”). Of course, dear reader, you might take all this with a grain of salt: I am most probably drinking the water a bit as well, as I am currently spending my free time developing in NodeJS. Stylus and Jade templates are all up in my project folders, because, well, Stylus and Jade were developed with NodeJS in mind.
CSS preprocessors are great. Stylus, while a relative newcomer to the game, is a truly elegant solution which deserves consideration in your front end development stack. Regardless of which CSS preprocessor you use, though, just make sure you’re using one! P.S. Apologies for this overly cheesy post; I’ve been watching a lot of BBC’s Merlin.