Issue

Currently in config/webpack/commonWebpackConfig.js:49-61, we directly mutate nested loader options:

if (cssLoader?.options?.modules) { cssLoader.options.modules.namedExport = false; cssLoader.options.modules.exportLocalsConvention = 'camelCase'; }

This risks affecting shared objects from Shakapacker's defaults.

Solution

Use object spread for immutability (already done correctly in serverWebpackConfig.js):

if (cssLoader?.options?.modules) { cssLoader.options.modules = { ...cssLoader.options.modules, namedExport: false, exportLocalsConvention: 'camelCase', }; }

Related

Similar pattern needed in Sass loader configuration (lines 80-96).