PostCSS as a processing system is easy to set up and use, but occasionally we may come across issues during development. The issues will vary, of course, but to help you along, we can explore some of the more common issues we may face during development.
For the purposes of this chapter, we will assume that the Gulp task runner has been used—you will likely see similar issues with other task runners such as Grunt or Broccoli. It's time to explore some of these issues in more detail.
The beauty of PostCSS is that we can install any one of dozens of plugins available—if we're using a task runner such as Gulp, then we can easily extend this to cover the vast array available for use.
In most instances, plugins will install without a hitch; you may find that you see this appear occasionally:
The warning message that is of most importance to us is not the ENOENT
messages, but this one:
notsup: Not compatible with your operating...