feat: onExports hook

Author: DmShpak

package.json

@@ -1,12 +1,12 @@
 {
-  "name": "css-loader",
+  "name": "css-loader-with-hooks",
   "version": "5.0.1",
-  "description": "css loader module for webpack",
+  "description": "css loader module for webpack with hooks feature",
   "license": "MIT",
   "repository": "webpack-contrib/css-loader",
-  "author": "Tobias Koppers @sokra",
-  "homepage": "https://github.com/webpack-contrib/css-loader",
-  "bugs": "https://github.com/webpack-contrib/css-loader/issues",
+  "author": "Dmytro Shpak",
+  "homepage": "https://github.com/DmShpak/css-loader",
+  "bugs": "https://github.com/DmShpak/css-loader/issues",
   "funding": {
     "type": "opencollective",
     "url": "https://opencollective.com/webpack"

src/index.js

@@ -26,6 +26,7 @@ import {
   getModulesPlugins,
   normalizeSourceMap,
   sort,
+  getHooks,
 } from "./utils";
 
 export default async function loader(content, map, meta) {
@@ -209,6 +210,7 @@ export default async function loader(content, map, meta) {
     }
   }
 
+  getHooks(exports, options, this);
   const importCode = getImportCode(imports, options);
   const moduleCode = getModuleCode(result, api, replacements, options, this);
   const exportCode = getExportCode(exports, replacements, options);

src/options.json

@@ -143,6 +143,10 @@
     "esModule": {
       "description": "Use the ES modules syntax (https://github.com/webpack-contrib/css-loader#esmodule).",
       "type": "boolean"
+    },
+    "onExports": {
+      "description": "Hook exports object",
+      "instanceof": "Function"
     }
   },
   "type": "object"

src/utils.js

@@ -247,6 +247,10 @@ function normalizeOptions(rawOptions, loaderContext) {
         : rawOptions.importLoaders,
     esModule:
       typeof rawOptions.esModule === "undefined" ? true : rawOptions.esModule,
+    onExports:
+      typeof rawOptions.onExports === "function"
+        ? rawOptions.onExports
+        : undefined,
   };
 }
 
@@ -704,6 +708,12 @@ function sort(a, b) {
   return a.index - b.index;
 }
 
+function getHooks(exports, options, loaderContext) {
+  if (options.onExports) {
+    options.onExports(exports, loaderContext);
+  }
+}
+
 export {
   normalizeOptions,
   shouldUseModulesPlugins,
@@ -723,4 +733,5 @@ export {
   resolveRequests,
   isUrlRequestable,
   sort,
+  getHooks,
 };