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Add to SafariWhen comparing Topcoat vs PostCSS, the Slant community recommends PostCSS for most people. In the question“What are the best minimal CSS frameworks?” PostCSS is ranked 12th while Topcoat is ranked 19th. The most important reason people chose PostCSS is:
PostCSS is 3-30 times faster than Sass (including libsass), Less, and Stylus
Question Ranking
Pros
Pro Focused on performance
Every Topcoat component is built with performance in mind. Most of the stylesheets are small and do not take too long to load.
Pro Fast
PostCSS is 3-30 times faster than Sass (including libsass), Less, and Stylus
Pro Flexible
PostCSS allows you to opt-in to the features you need with plugins. This allows you to set it up to behave exactly like Sass, with nesting, mixing, extends, and more. On the other hand, it allows you to use plugins by themselves for things like auto-prefixing, minification, and more. You can even set up your own custom "stack" of plugins to do exactly what you like.
Pro Doesn't force designers to learn a new syntax
Rather than learn a different syntax, PostCSS allows you to write in pure CSS.
Pro JavaScript-based out of the box
Since it's basically CSS extended through JavaScript it works in the browser directly without the need to compile it beforehand.
Cons
Con Not so impressive design
But it is themeable.
Con Some issues with typography
For some components the text size is quite small, while for others it's too light over a light background, making the text harder to read.
Con Harder to install and keep working
The immense flexibility of PostCSS plus its current rapid evolution makes it harder to install, configure and keep running than the more monolithic and mature preprocessors.
Con Outdatet, plugins are often based on different postcss versions and don't work together properly
Con Some plugins need to run in a certain order
Some plugins can only work if initialized after some other plugins. For example, transforming and applying CSS variables needs to run before running a plugin which uses these variables inside conditional transformations.
