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// Example webpack configuration with asset fingerprinting in production.
'use strict';
const path = require('path');
const webpack = require('webpack');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const WorkboxPlugin = require('workbox-webpack-plugin');
const WebpackAssetsManifest = require('webpack-assets-manifest');
// set NODE_ENV=production on the environment to add asset fingerprints
const currentEnv = process.env.NODE_ENV || 'development';
const isProduction = currentEnv === 'production';
const preScripts = {
development: [],
production: []
};
const preScriptsEnv = isProduction ?
preScripts['production'] :
preScripts['development'];
const cssLoaders = [
MiniCssExtractPlugin.loader,
{
loader: 'css-loader',
options: {
modules: false,
sourceMap: true
}
},
{
loader: 'postcss-loader',
options: {
sourceMap: true
}
}
];
const config = {
target: 'web',
mode: currentEnv,
performance: {
hints: false
},
entry: {
app: preScriptsEnv.concat(['./assets/app.js'])
},
output: {
// Build assets directly in to public/webpack/, let webpack know
// that all webpacked assets start with webpack/
// must match config.webpack.output_dir
path: path.join(__dirname, '.assets-build'),
publicPath: '/',
filename: isProduction ? '[name]-[contenthash].js' : '[name].js',
assetModuleFilename: 'assets/[name]-[contenthash][ext]',
clean: true
},
resolve: {
modules: [
'node_modules',
path.join(__dirname, 'assets')
],
extensions: ['.js', '.json', '.css']
},
module: {
rules: [
{
test: /\.(js|jsx)$/,
exclude: /node_modules/,
use: {
loader: 'babel-loader',
options: {
cacheCompression: true,
cacheDirectory: path.resolve(
__dirname,
'tmp/cache/babel-loader'
)
}
}
},
{
test: /\.(gif|jpg|png|woff|woff2|eot|ttf|svg|ico)$/,
type: 'asset',
parser: {
dataUrlCondition: {
maxSize: 10000
}
}
},
{
test: /\.css$/,
use: cssLoaders
}
]
},
plugins: [
new MiniCssExtractPlugin({
filename: isProduction ? '[name]-[contenthash].css' : '[name].css'
})
],
optimization: {
splitChunks: {
chunks: 'async',
cacheGroups: {
styles: {
name: 'app',
type: 'css/mini-extract',
chunks: 'all',
enforce: true
}
}
}
},
cache: {
type: 'filesystem',
compression: 'gzip',
hashAlgorithm: 'md4',
allowCollectingMemory: true,
cacheDirectory: path.resolve(__dirname, 'tmp/cache/webpack'),
buildDependencies: {
config: [__filename],
lockfile: [path.resolve(__dirname, 'yarn.lock')]
}
},
snapshot: {
module: {timestamp: true, hash: Boolean(process.env.CI)},
resolve: {timestamp: true, hash: Boolean(process.env.CI)},
buildDependencies: {timestamp: true, hash: true},
resolveBuildDependencies: {timestamp: true, hash: true}
}
};
if (isProduction) {
config.plugins.push(
new webpack.NoEmitOnErrorsPlugin(),
new webpack.DefinePlugin({
'process.env': {NODE_ENV: JSON.stringify('production')}
}),
new webpack.optimize.ModuleConcatenationPlugin()
);
config.optimization = config.optimization || {};
config.optimization.minimizer = [
new TerserPlugin({
parallel: true,
terserOptions: {
toplevel: true,
parse: {
// Let terser parse ecma 8 code but always output
// ES6+ compliant code for older browsers
ecma: 8
},
compress: {
ecma: 2016,
warnings: false,
comparisons: false
},
mangle: {
toplevel: true,
safari10: false
},
output: {
ecma: 2016,
comments: false,
ascii_only: true
}
}
}),
new CssMinimizerPlugin({
minimizerOptions: {
preset: [
'default',
{
discardComments: {removeAll: true},
mergeRules: false, // right now it break focus-visible
svgo: false
}
]
}
})
];
// Source maps
config.devtool = 'source-map';
} else {
config.optimization = config.optimization || {};
config.optimization.moduleIds = 'named';
// Source maps
config.devtool = 'inline-source-map';
}
config.plugins.push(
new WebpackAssetsManifest({
output: 'manifest.json',
publicPath: config.output.publicPath,
writeToDisk: true,
integrity: true,
integrityHashes: ['sha256']
}),
new WorkboxPlugin.InjectManifest({
swSrc: './assets/sw.js',
swDest: 'sw.js',
compileSrc: true,
maximumFileSizeToCacheInBytes: (isProduction ? 2097152 : 15730000)
})
)
module.exports = config;
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