feat: auto resolving css-modules import (Issue #994)

Author: cap-Bernardito

README.md

@@ -541,11 +541,17 @@ module.exports = {
 
 ##### `mode`
 
-Type: `String`
+Type: `String|Function`
 Default: `'local'`
 
 Setup `mode` option. You can omit the value when you want `local` mode.
 
+###### `String`
+
+Possible values:
+
+`local`, `global`, `pure`
+
 **webpack.config.js**
 
 ```js
@@ -566,6 +572,41 @@ module.exports = {
 };
 ```
 
+###### `Function`
+
+Allows set different values modules.mode based on filename
+
+Possible return values:
+
+`local`, `global`, `pure`
+
+**webpack.config.js**
+
+```js
+module.exports = {
+  module: {
+    rules: [
+      {
+        test: /\.css$/i,
+        loader: 'css-loader',
+        options: {
+          modules: {
+            // Callback must return "local", "global" or "pure"
+            mode: (filename) => {
+              if (/global.css$/i.test(filename)) {
+                return 'global';
+              }
+
+              return 'local';
+            },
+          },
+        },
+      },
+    ],
+  },
+};
+```
+
 ##### `localIdentName`
 
 Type: `String`

test/__snapshots__/modules-option.test.js.snap

@@ -377,7 +377,7 @@ exports[`"modules" option issue #1063 throw error: module 1`] = `
 var ___CSS_LOADER_API_IMPORT___ = require(\\"../../../../src/runtime/api.js\\");
 exports = ___CSS_LOADER_API_IMPORT___(false);
 // Module
-exports.push([module.id, \\".className {\\\\n  color: green;\\\\n}\\\\n\\\\n:global(.otherClass) {\\\\n  color: blue;\\\\n}\\\\n\\", \\"\\"]);
+exports.push([module.id, \\".classNameLocalFile {\\\\n  color: green;\\\\n}\\\\n\\\\n:global(.otherClassLocalFile) {\\\\n  color: blue;\\\\n}\\\\n\\", \\"\\"]);
 // Exports
 module.exports = exports;
 "
@@ -388,26 +388,26 @@ exports[`"modules" option issue #1063 throw error: module 2`] = `
 var ___CSS_LOADER_API_IMPORT___ = require(\\"../../../../src/runtime/api.js\\");
 exports = ___CSS_LOADER_API_IMPORT___(false);
 // Module
-exports.push([module.id, \\".className {\\\\n  color: green;\\\\n}\\\\n\\\\n:local(.otherClass) {\\\\n  color: blue;\\\\n}\\\\n\\", \\"\\"]);
+exports.push([module.id, \\".classNameGlobalFile {\\\\n  color: black;\\\\n}\\\\n\\\\n:local(.otherClassGlobalFile) {\\\\n  color: coral;\\\\n}\\\\n\\", \\"\\"]);
 // Exports
 module.exports = exports;
 "
 `;
 
 exports[`"modules" option issue #1063 throw error: result 1`] = `
-".className {
+".classNameLocalFile {
   color: green;
 }
 
-:global(.otherClass) {
+:global(.otherClassLocalFile) {
   color: blue;
 }
-.className {
-  color: green;
+.classNameGlobalFile {
+  color: black;
 }
 
-:local(.otherClass) {
-  color: blue;
+:local(.otherClassGlobalFile) {
+  color: coral;
 }
 "
 `;
@@ -421,10 +421,10 @@ exports[`"modules" option issue #1063: module 1`] = `
 var ___CSS_LOADER_API_IMPORT___ = require(\\"../../../../src/runtime/api.js\\");
 exports = ___CSS_LOADER_API_IMPORT___(false);
 // Module
-exports.push([module.id, \\"._1iR-jQngOXizCZOLZck-4P {\\\\n  color: green;\\\\n}\\\\n\\\\n.otherClass {\\\\n  color: blue;\\\\n}\\\\n\\", \\"\\"]);
+exports.push([module.id, \\"._2cZDGA9F7Kx1vfQmWcLP51 {\\\\n  color: green;\\\\n}\\\\n\\\\n.otherClassLocalFile {\\\\n  color: blue;\\\\n}\\\\n\\", \\"\\"]);
 // Exports
 exports.locals = {
-	\\"className\\": \\"_1iR-jQngOXizCZOLZck-4P\\"
+	\\"classNameLocalFile\\": \\"_2cZDGA9F7Kx1vfQmWcLP51\\"
 };
 module.exports = exports;
 "
@@ -435,30 +435,29 @@ exports[`"modules" option issue #1063: module 2`] = `
 var ___CSS_LOADER_API_IMPORT___ = require(\\"../../../../src/runtime/api.js\\");
 exports = ___CSS_LOADER_API_IMPORT___(false);
 // Module
-exports.push([module.id, \\"._2WZy6LhVz_KGVbdNCAmL6C {\\\\n  color: green;\\\\n}\\\\n\\\\n._7mafm73rmgiKuViZtzNmn {\\\\n  color: blue;\\\\n}\\\\n\\", \\"\\"]);
+exports.push([module.id, \\".classNameGlobalFile {\\\\n  color: black;\\\\n}\\\\n\\\\n._2rcag09JpwrP4_hfyyRmm- {\\\\n  color: coral;\\\\n}\\\\n\\", \\"\\"]);
 // Exports
 exports.locals = {
-	\\"className\\": \\"_2WZy6LhVz_KGVbdNCAmL6C\\",
-	\\"otherClass\\": \\"_7mafm73rmgiKuViZtzNmn\\"
+	\\"otherClassGlobalFile\\": \\"_2rcag09JpwrP4_hfyyRmm-\\"
 };
 module.exports = exports;
 "
 `;
 
 exports[`"modules" option issue #1063: result 1`] = `
-"._1iR-jQngOXizCZOLZck-4P {
+"._2cZDGA9F7Kx1vfQmWcLP51 {
   color: green;
 }
 
-.otherClass {
+.otherClassLocalFile {
   color: blue;
 }
-._2WZy6LhVz_KGVbdNCAmL6C {
-  color: green;
+.classNameGlobalFile {
+  color: black;
 }
 
-._7mafm73rmgiKuViZtzNmn {
-  color: blue;
+._2rcag09JpwrP4_hfyyRmm- {
+  color: coral;
 }
 "
 `;

test/fixtures/modules/issue-1063/global.css

@@ -1,7 +1,7 @@
-.className {
-  color: green;
+.classNameGlobalFile {
+  color: black;
 }
 
-:local(.otherClass) {
-  color: blue;
+:local(.otherClassGlobalFile) {
+  color: coral;
 }

test/fixtures/modules/issue-1063/local.css

@@ -1,7 +1,7 @@
-.className {
+.classNameLocalFile {
   color: green;
 }
 
-:global(.otherClass) {
+:global(.otherClassLocalFile) {
   color: blue;
 }

test/modules-option.test.js

@@ -570,7 +570,7 @@ describe('"modules" option', () => {
     const compiler = getCompiler('./modules/issue-1063/issue-1063.js', {
       modules: {
         mode: (resourcePath) => {
-          if (resourcePath === 'global.css') {
+          if (/global.css$/i.test(resourcePath)) {
             return 'global';
           }