Hello and thank you for your reply. I didn't manage to get this to work correctly. If I run npm start before importing the scss, it works (client side), but if I restart the server npm start I get this error: I:\dev\mern\NewApp\node_modules\react-toolbox\lib\ripple\theme.scss:1 (function (exports, require, module, __filename, __dirname) { @import "../colors"; ^ SyntaxError: Unexpected token ILLEGAL at Object.exports.runInThisContext (vm.js:53:16) at Module._compile (module.js:513:28) at Module._extensions..js (module.js:550:10) at Object.require.extensions.(anonymous function) [as .js] (I:\dev\mern\NewApp\node_modules\babel-register\lib\node.js:166:7) at Module.load (module.js:458:32) at tryModuleLoad (module.js:417:12) at Function.Module._load (module.js:409:3) at Module.require (module.js:468:17) at require (internal/module.js:20:19) at Object.<anonymous> (I:\dev\mern\NewApp\node_modules\react-toolbox\lib\ripple\index.js:13:14) at Module._compile (module.js:541:32) at Module._extensions..js (module.js:550:10) at Object.require.extensions.(anonymous function) [as .js] (I:\dev\mern\NewApp\node_modules\babel-register\lib\node.js:166:7) at Module.load (module.js:458:32) at tryModuleLoad (module.js:417:12) at Function.Module._load (module.js:409:3) [nodemon] app crashed - waiting for file changes before starting... Could you please provide more precise indications to where to put the loader (which webpack file) and where to put the import. Best,