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webpack.config.js
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webpack.config.js
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import { resolve } from 'path'
import ReactRefreshWebpackPlugin from '@pmmmwh/react-refresh-webpack-plugin'
import Dotenv from 'dotenv-webpack'
import { GenerateSW } from 'workbox-webpack-plugin'
import babel from './babel.config.js'
const isProd = ({ NODE_ENV }) => NODE_ENV === JSON.stringify('production')
const isHot = env => !isProd(env)
const __dirname = resolve()
const config = env => ({
entry: './main.js',
mode: isHot(env) ? 'development' : 'production',
output: {
filename: '[name].bundle.js',
path: `${__dirname}/public`,
publicPath: '/',
},
resolve: {
extensions: ['.jsx', '.js', '.json'],
alias: {
'~': __dirname,
},
},
devServer: devServer(env),
module: {
rules: [
{
test: /\.jsx?$/,
exclude: /node_modules/,
use: [
{
loader: 'babel-loader',
options: babel,
},
],
},
{
test: /\.(jpeg|jpg|png|)$/,
use: 'url-loader',
},
{
test: /\.css$/,
use: [
'style-loader',
{
loader: 'css-loader',
},
],
},
{
test: /\.(txt|md|markdown)$/,
use: 'raw-loader',
},
],
},
optimization: {
mergeDuplicateChunks: true,
removeEmptyChunks: true,
runtimeChunk: 'single',
splitChunks: {
maxInitialRequests: 20, // for HTTP2
maxAsyncRequests: 20, // for HTTP2
minSize: 40,
cacheGroups: {
vendors: {
test: /[\\/]node_modules[\\/]/,
name: 'vendors',
chunks: 'all',
},
},
},
},
plugins: plugins(env),
})
const plugins = env => {
const commonPlugins = [new Dotenv({ systemvars: true })]
return isHot(env)
? [...commonPlugins, new ReactRefreshWebpackPlugin()]
: [
...commonPlugins,
new GenerateSW({
// these options encourage the ServiceWorkers to get in fast and
// disallow any straggling "old" ServiceWorkers to hang around
clientsClaim: true,
skipWaiting: true,
}),
]
}
function devServer(env) {
if (isProd(env)) return
const { FIREBASE_SERVE_URL } = env
return {
compress: true,
allowedHosts: 'all',
hot: true,
proxy: FIREBASE_SERVE_URL && [
{
context: ['/'],
target: FIREBASE_SERVE_URL,
},
],
}
}
export default config(process.env)