Add folders option

package.json

@@ -1,6 +1,6 @@
 {
   "name": "laravel-mix-purgecss",
-  "version": "2.1.3",
+  "version": "2.2.0-rc.1",
   "description": "Purgecss wrapper for Laravel Mix",
   "main": "src/index.js",
   "repository": {

src/index.js

@@ -1,4 +1,5 @@
 const mix = require('laravel-mix');
+const { flatMap } = require('./util');
 const createPurgeCssPlugin = require('./createPurgeCssPlugin');
 
 // This is kind of an undocumented Mix function, hope it stays around! Easy to
@@ -20,6 +21,7 @@ class PurgeCss {
         this.options = Object.assign(
             {
                 enabled: mix.inProduction(),
+                folders: ['resources'],
                 extensions: ['html', 'js', 'jsx', 'ts', 'tsx', 'php', 'vue'],
                 globs: [],
                 whitelistPatterns: [],
@@ -29,7 +31,11 @@ class PurgeCss {
 
         this.options.globs.push(
             rootPath('app/**/*.php'),
-            ...this.options.extensions.map(extension => rootPath(`resources/**/*.${extension}`))
+            ...flatMap(this.options.folders, folder => {
+                return this.options.extensions.map(extension =>
+                    rootPath(`${folder}/**/*.${extension}`)
+                );
+            })
         );
 
         this.options.whitelistPatterns.push(/-active$/, /-enter$/, /-leave-to$/);

src/util.js

@@ -10,4 +10,8 @@ module.exports = {
 
         return omitted;
     },
+
+    flatMap(array, callback) {
+        return Array.prototype.concat.apply([], array.map(callback));
+    },
 };