PurgeCSS class
Class used to instantiate PurgeCSS and can then be used to purge CSS files.
Signature:
declare class PurgeCSS 
Example
await new PurgeCSS().purge({
   content: ['index.html'],
   css: ['css/app.css']
})
Properties
| Property | Modifiers | Type | Description | 
|---|---|---|---|
| postcss.Node[] | |||
| Set<string> | |||
Methods
| Method | Modifiers | Description | 
|---|---|---|
| Extract the selectors present in the files using a PurgeCSS extractor | ||
| Extract the selectors present in the passed string using a PurgeCSS extractor | ||
| Get the purged version of the css based on the files | ||
| Remove unused CSS | ||
| Remove unused CSS variables | ||
| Remove unused font-faces | ||
| Remove unused keyframes | ||
| Walk through the CSS AST and remove unused CSS | 
