Facing issue with reducer.js and it is necessary to add webpack as one of the solution suggest to use webpack

[1410Arpita]

Failed to compile
./src/reducer.js 10:16
Module parse failed: Unexpected token (10:16)
You may need an appropriate loader to handle this file type.
| // Selector
| export var getBasketTotal = function getBasketTotal(basket) {

return basket?.reduce(function (amount, item) {
| return item.price + amount;
| }, 0);
This error occurred during the build time and cannot be dismissed.