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webpack.config.js
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webpack.config.js
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const webpack = require('webpack');
const path = require('path');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const RemoveEmptyScriptsPlugin = require('webpack-remove-empty-scripts');
const TerserPlugin = require('terser-webpack-plugin');
/**
* 出力元と出力先のディレクトリを定義
*/
const dir = {
src: path.join(__dirname, '_src'),
dist: {
base: path.join(__dirname, 'public/assets'),
css: 'css/',
js: 'js/',
}
};
module.exports = [
{
/**
* 出力先ファイル名: 出力元ファイル名(エントリーポイント)
*/
entry: {
application: path.resolve(dir.src, 'js/_index.js'),
'style.css': path.resolve(dir.src, 'sass/_index.scss'),
},
output: {
filename: dir.dist.js + '[name].js',
path: dir.dist.base,
},
plugins: [
new RemoveEmptyScriptsPlugin(),
new MiniCssExtractPlugin({
filename: dir.dist.css + '[name]',
}),
],
resolve: {
modules: ['node_modules'],
extensions: ['.js', '.css'],
},
devtool: 'source-map',
optimization: {
minimizer: [
new CssMinimizerPlugin(),
new TerserPlugin({
terserOptions: {
ecma: 6,
compress: {
drop_console: true, // build時にconsole.logを出力しない
},
output: {
comments: false,
beautify: false,
},
},
}),
],
},
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
use: [
{
loader: 'babel-loader',
options: {
presets: [
'@babel/preset-env'
],
plugins: [
'@babel/plugin-transform-runtime'
],
},
},
],
},
{
test: /\.(sass|scss|css)$/,
use: [
{
loader: MiniCssExtractPlugin.loader,
},
{
loader: 'css-loader',
options: {
url: false,
sourceMap: true,
importLoaders: 2,
},
},
{
loader: 'postcss-loader',
options: {
sourceMap: true,
},
},
{
loader: 'sass-loader',
options: {
sourceMap: true,
},
},
],
},
],
}
}
];