Consider rejected option and add to stats data if true

Author: SassNinja

README.md

@@ -184,6 +184,10 @@ new PurgecssPlugin({
 })
 ```
 
+* #### rejected
+
+If `true` all removed selectors are added to the [Stats Data](https://webpack.js.org/api/stats/) as `purged`.
+
 ## Contributing
 
 Please read [CONTRIBUTING.md](./CONTRIBUTING.md) for details on our code of conduct, and the process for submitting pull requests to us.

lib/purgecss-webpack-plugin.es.js

@@ -155,6 +155,7 @@ var files = function files(chunk) {
 var webpackVersion = 4;
 var styleExtensions = ['.css', '.scss', '.styl', '.sass', '.less'];
 var pluginName = 'PurgeCSS';
+var purgedStats = {};
 
 var PurgecssPlugin =
 /*#__PURE__*/
@@ -178,10 +179,25 @@ function () {
         compiler.hooks.compilation.tap(pluginName, function (compilation) {
           _this.initializePlugin(compilation);
         });
+        compiler.hooks.done.tapAsync(pluginName, function (stats, cb) {
+          _this.addStats(stats);
+
+          cb();
+        });
       } else {
         compiler.plugin('this-compilation', function (compilation) {
           _this.initializePlugin(compilation);
         });
+        compiler.plugin('done', function (stats) {
+          _this.addStats(stats);
+        });
+      }
+    }
+  }, {
+    key: "addStats",
+    value: function addStats(stats) {
+      if (this.options.rejected) {
+        stats.purged = purgedStats;
       }
     }
   }, {
@@ -259,7 +275,13 @@ function () {
           }
 
           var purgecss = new Purgecss(options);
-          compilation.assets[name] = new ConcatSource(purgecss.purge()[0].css);
+          var purged = purgecss.purge()[0];
+
+          if (purged.rejected) {
+            purgedStats[name] = purged.rejected;
+          }
+
+          compilation.assets[name] = new ConcatSource(purged.css);
         });
       });
       callback();

lib/purgecss-webpack-plugin.js

@@ -159,6 +159,7 @@ var files = function files(chunk) {
 var webpackVersion = 4;
 var styleExtensions = ['.css', '.scss', '.styl', '.sass', '.less'];
 var pluginName = 'PurgeCSS';
+var purgedStats = {};
 
 var PurgecssPlugin =
 /*#__PURE__*/
@@ -182,10 +183,25 @@ function () {
         compiler.hooks.compilation.tap(pluginName, function (compilation) {
           _this.initializePlugin(compilation);
         });
+        compiler.hooks.done.tapAsync(pluginName, function (stats, cb) {
+          _this.addStats(stats);
+
+          cb();
+        });
       } else {
         compiler.plugin('this-compilation', function (compilation) {
           _this.initializePlugin(compilation);
         });
+        compiler.plugin('done', function (stats) {
+          _this.addStats(stats);
+        });
+      }
+    }
+  }, {
+    key: "addStats",
+    value: function addStats(stats) {
+      if (this.options.rejected) {
+        stats.purged = purgedStats;
       }
     }
   }, {
@@ -263,7 +279,13 @@ function () {
           }
 
           var purgecss = new Purgecss(options);
-          compilation.assets[name] = new webpackSources.ConcatSource(purgecss.purge()[0].css);
+          var purged = purgecss.purge()[0];
+
+          if (purged.rejected) {
+            purgedStats[name] = purged.rejected;
+          }
+
+          compilation.assets[name] = new webpackSources.ConcatSource(purged.css);
         });
       });
       callback();

src/index.js

@@ -8,6 +8,7 @@ let webpackVersion = 4
 
 const styleExtensions = ['.css', '.scss', '.styl', '.sass', '.less']
 const pluginName = 'PurgeCSS'
+const purgedStats = {}
 
 export default class PurgecssPlugin {
     constructor(options) {
@@ -23,10 +24,23 @@ export default class PurgecssPlugin {
             compiler.hooks.compilation.tap(pluginName, compilation => {
                 this.initializePlugin(compilation)
             })
+            compiler.hooks.done.tapAsync(pluginName, (stats, cb) => {
+                this.addStats(stats);
+                cb();
+            })
         } else {
             compiler.plugin('this-compilation', compilation => {
                 this.initializePlugin(compilation)
             })
+            compiler.plugin('done', stats => {
+                this.addStats(stats)
+            })
+        }
+    }
+
+    addStats(stats) {
+        if (this.options.rejected) {
+            stats.purged = purgedStats
         }
     }
 
@@ -100,8 +114,15 @@ export default class PurgecssPlugin {
                 if (typeof options.whitelistPatternsChildren === 'function') {
                     options.whitelistPatternsChildren = options.whitelistPatternsChildren()
                 }
+
                 const purgecss = new Purgecss(options)
-                compilation.assets[name] = new ConcatSource(purgecss.purge()[0].css)
+                const purged = purgecss.purge()[0];
+
+                if (purged.rejected) {
+                    purgedStats[name] = purged.rejected;
+                }
+
+                compilation.assets[name] = new ConcatSource(purged.css)
             })
         })