Webpack5 - 빌드 전 bundle, 원하는 디렉토리 삭제하고 빌드하기

빌드시 임시 이미지 저장 파일디렉토리와 같은 것을 삭제하기 좋다.

 

---

 

1. 라이브러리 가져오기

npm install clean-webpack-plugin --save-dev

 

2. webpack.config.js 설정

// can't use ecma script module. use only common.js
const path = require('path');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
// ↓↓↓↓↓↓ 추가하기
const {CleanWebpackPlugin} = require('clean-webpack-plugin');

// minimum option
module.exports = {
    entry: './src/index.js',
    output: {
        filename: 'bundle.[contenthash].js',
        path: path.resolve(__dirname, './dist'),
        /**
         * publicPath
         * under version 4: publicPath is empty('').
         * over version 4: publicPath is auto
         * 
         * can use list
         *      1. 'dist/'
         *      2. 'https://image.oliveyoung.co.kr/uploads/contents/202410/25oyDay/pc_visual.jpg'
         */
        publicPath: 'dist/'
    },
    mode: 'none',
    module: {
        /**
         * webpack: I don't know what that menas 'import Kiwi...'
         * me: thank you for asking, If you don't know somethig, you should check out the rules.
         * webpack: perfect
         */
        rules: [
            {
                test: /\.(png|jpg)$/,
                /**
                 * asset/inline  :bake image into base64. could be larger file size(more better)
                 * asset/resource: request image each of them. cost of call is larger
                 */
                type: 'asset',
                parser: {
                    dataUrlCondition: {
                        maxSize: 3 * 1024 // 3kilobyte
                    }
                }
            },
            {
                test: /\.txt$/,
                type: 'asset/source'
            },
            {
                // loader should be installed explicitly
                test: /\.css$/,
                use: [
                    MiniCssExtractPlugin.loader, 'css-loader'
                ]
            },
            {
                test: /\.scss$/,
                // webpack invoke right to left in array
                // 
                use: [
                    MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader'
                ]
            },
            {
                test: /\.js$/,
                exclude: /node_modules/,
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: ['@babel/env'],// ecmascript 8,7,6,5 make down version
                        plugins: ['@babel/plugin-proposal-class-properties']
                    }
                }
            }
        ],
    },
    plugins: [
        new TerserPlugin(),
        new MiniCssExtractPlugin({
            filename: 'style.[contenthash].css',
        }),
        // ↓↓↓↓↓↓ 추가하기
        new CleanWebpackPlugin({
            cleanOnceBeforeBuildPatterns: [
                '**/*',
                path.join(process.cwd(), 'build/')
            ]
        })
    ]
}

 

3. 

 

cleanOnceBeforeBuildPatterns는 

클린시켜 줄 디렉토리를 설정한다.

 

build 하위에 있는

**/* 

모든 파일을 삭제한다는 의미이다.