Added 'modules' mode loader option

Author: samuelmaddock

lib/loader.js

@@ -64,13 +64,14 @@ module.exports = function (source, map) {
         const content = prevResult.themeCss;
 
         const options = loaderUtils.getOptions(loader) || {};
+        const moduleMode = options.modules;
         const localIdentName = options.localIdentName || '[hash:base64]';
         const customGetLocalIdent = options.getLocalIdent || getLocalIdent;
 
         // convert local classnames for css modules
         return postcss([
             localByDefault({
-                mode: 'local'
+                mode: moduleMode ? 'local' : 'global'
             }),
             modulesScope({
                 generateScopedName: function generateScopedName (exportName) {