The Pleeease library, available from http://pleeease.io/, is designed to simplify the use of preprocessors, and combine the benefits of using multiple tools in one library. It means we can configure it to any one of three processors, such as SASS, Less, or Stylus, in addition to PostCSS, when compiling our code. The compilation can also include all of the typical tasks we might otherwise have to do, such as generating source maps, adding vendor prefixes, and minifying the results.
The library is easy to install—in its simplest format, we can use a configuration file to compile at the command line. Alternatively, we can use any one of several plugins to hook into a task runner, such as Gulp or Grunt. Let's take a moment to explore this in more detail, beginning with installing and configuring the plugin for use.