For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug. If you want to add classes there that can affect the whole document, this is the place to do it. The resource you linking to is using Password match 'http' protocol, which may not work when the browser is using https.
All of them offer things like variables and mixins to provide convenient abstractions. It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: Or, choose Neither and nothing will be applied.
To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz. We offer two popular Password match Autoprefixer which processes your CSS server-side and -prefix-free which applies prefixes via a script, client-side.
If the preprocessor matches, "Password match" will attempt to combine them before processing. You can apply CSS to your Pen from any stylesheet on the web.