splitchunks.js

        splitChunks{
          cacheGroups: {
            styles: {
              name: 'styles',
              test: /\.s?css$/,
              chunks: 'all',
              minChunks: 1,
              reuseExistingChunk: true,
              enforce: true,
            },
            vendor: {
              test: /[\\/]node_modules[\\/](react|react-dom)[\\/]/,
              name: 'vendor',
              chunks: 'all'
            }
          }
        }