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webpack.config.js
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webpack.config.js
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const path = require('path');
const TerserPlugin = require('terser-webpack-plugin');
const StatsPlugin = require('stats-webpack-plugin');
const CompressionPlugin = require('compression-webpack-plugin');
const DotenvWebpack = require('dotenv-webpack');
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
module.exports = () => {
return {
mode: 'production', // 本番用(開発ならdevelopment(圧縮されない))
entry: ['@babel/polyfill', './src/assets/js/index.js'], // バンドル前のやつのエントリポイント
// devtool: 'inline-source-map', // 本番ビルドではコメントアウト必須(bundle.jsがめちゃくちゃでかくなる)
plugins: [
new DotenvWebpack({
path: path.join(__dirname, '.env'),
systemvars: true,
}),
// new StatsPlugin('stats.json', {
// chunkModules: true,
// }),
// new BundleAnalyzerPlugin(),
new CompressionPlugin({
test: /\.(css)|(js)$/,
compressionOptions: {
level: 9,
},
}),
],
output: {
// バンドル先
filename: 'bundle.js',
path: path.join(__dirname, './dist/js'),
},
optimization: {
minimizer: [
// js圧縮
new TerserPlugin({
extractComments: 'all', // コメント削除
terserOptions: {
compress: {
drop_console: true, // console.log削除
},
},
}),
],
},
module: {
// ここ追加
rules: [
{
test: /\.js$/,
exclude: /node_modules\/(?!(dom7|ssr-window|swiper)\/).*/,
use: [
{
loader: 'babel-loader',
options: {
presets: [
'@babel/preset-env', // デフォルトでES5になるはず
],
},
},
],
},
{
test: /\.(glsl|vs|fs|vert|frag)$/,
exclude: /node_modules/,
use: ['raw-loader'],
},
],
},
};
};