const path = require('path')
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin')
const TerserPlugin = require('terser-webpack-plugin')

module.exports = {
    mode: 'production',
    performance: {
        assetFilter: (assetFilename) => !/\.map$/.test(assetFilename),
        hints: 'error',
        maxAssetSize: 300 * 1024, // 300KB
    },
    cache: false,
    output: {
        path: path.resolve(__dirname, 'prod_build'),
        pathinfo: false,
    },
    optimization: {
        minimizer: [
            new CssMinimizerPlugin(),
            new TerserPlugin(),
        ],
        flagIncludedChunks: true,
        usedExports: true,
        sideEffects: true,
        concatenateModules: true,
        emitOnErrors: false,
        nodeEnv: 'production',
        minimize: true,
    },
    stats: 'errors-warnings',
    module: {
        unsafeCache: false,
        rules: [
            {
                test: /\.css$/i,
                use: [
                    'style-loader',
                    'css-loader'
                ],
            },
            {
                test: /\.less$/i,
                use: [
                    'style-loader',
                    'css-loader',
                    {
                        loader: 'less-loader',
                        options: {
                            lessOptions: {
                                javascriptEnabled: true,
                            },
                        },
                    },
                ],
            }
        ]
    },
}