Webpack 4配置入口点和输出(每个项目文件夹中生成的dist文件夹)

Question

案例是拥有主文件夹'Projects'并在那里安装所有带有配置的webpack 4文件.在"Projects"文件夹中有很多文件夹,比如'Project1', 'Project2', etc...我想从'node_modules'入口点开始,webpack.config.js然后自定义其他入口点,如./Project1/js/app.jsx输出./Project1/dist/js/main.js,与scss和index.html相同,都在'dist'文件夹中生成.事情是始终只在主'Projects'文件夹中安装了node_modules .

---

package.json:

{
  "name": "webpack4_example",
  "version": "1.0.0",
  "main": "index.js",
  "browserslist": ["last 2 versions"],
  "scripts": {
    "build": "webpack --mode production",
    "watch": "webpack --watch --mode development",
    "start": "webpack-dev-server --open --mode development"
  },
  "devDependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.4",
    "babel-preset-env": "^1.7.0",
    "babel-preset-react": "^6.24.1",
    "babel-preset-stage-2": "^6.24.1",
    "css-loader": "^0.28.11",
    "html-loader": "^0.5.5",
    "html-webpack-plugin": "^3.2.0",
    "mini-css-extract-plugin": "^0.4.0",
    "node-sass": "^4.9.0",
    "postcss-loader": "^2.1.5",
    "prop-types": "^15.6.1",
    "react": "^16.3.2",
    "react-dom": "^16.3.2",
    "sass-loader": "^7.0.1",
    "webpack": "^4.8.3",
    "webpack-cli": "^2.1.3",
    "webpack-dev-server": "^3.1.4"
  }
}

---

webpack.config.js:

const path = require('path');
const HtmlWebPackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

module.exports = {
  entry: './Project1/js/app.jsx',                // customized entry point
  output: { 
    path: path.resolve(__dirname, 'dist'),  
    filename: './js/out.js'                     // generated ./Project1/dist/js/out.js
  },
  watch: true,
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.html$/,
        use: [
          { 
            loader: 'html-loader',
            options: { minimize: true } 
          }
        ]
      },
      {
        test: /\.(png|jpe?g)/i,
        use: [
          {
            loader: 'url-loader',
            options: {
              name: './img/[name].[ext]',
              limit: 10000
            }
          },
          {
            loader: 'img-loader'
          }
        ]
      },
      {
        test: /\.scss$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          'postcss-loader',
          'sass-loader'
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: './Project1/index.html',     // not sure how to set these sections
      filename: 'index.html'
    }),
    new MiniCssExtractPlugin({
      filename: '[name].css',
      chunkFilename: '[id].css'
    })
  ]
};

---

.babelrc:

{
  "presets": ["env", "react", "stage-2"]
}

---

根据我的理解,没有自定义入口点webpack默认将搜索'Projects/src/...'所有文件,如scss,js,img,index.html,index.js来操作它们,并将生成'Projects/dist'包含所有文件生成的文件夹.

上面的配置表单编译没有错误,但不会在任何地方生成'dist'文件夹,所以我不确定编译过程是否正确完成.

非常感谢任何建议和解决方案

Answer 1

解决方案（更新：添加工作监视文件）： 好的，我已经设法让它工作（起点是node_modules安装其他 webpack4 配置文件的位置，在Projects主文件夹中）

Projects
   |__Project1
   |         |__js
   |         |   |__app.jsx
   |         |__dist       //desirable result, generated dist folder
   |         |     |__*     //all generated folders/files html, js, css, img
   |         |__index.ejs  //renamed from index.html
   |
   |__Project2  //etc, project folders
   |
   |__src // if without customized entry points it's default source
   |    |__folders like /_scss, /img, /js
   |    |__index.js
   |    |__index.ejs   //renamed index.html, used when no customized
   |                   //entry points are set, same as for all /src
   |
   |__node_modules
   |__.babelrc
   |__package.json
   |__webpack.config.js

.babelrc 不变，与上一篇文章中的内容相同

在此示例中，Projects文件夹中通常创建src文件夹，其中包含要通过 webpack4 传递的所有文件/文件夹，/src/index.js文件中必须存在，用于导入一些其他文件

index.js 的示例

import style from "./_scss/main.scss";    //paths for Projects/src/...
import style from "./main.css";

包.json

{
  "name": "webpack4_example",
  "version": "1.0.0",
  "main": "index.js",            // the file explained just above
  "browserslist": ["last 2 versions"],
  "scripts": {
    "dev": "webpack --mode development ./Project1/js/app.jsx --output ./Project1/dist/js/main.js",
    "build": "webpack --mode production ./Project1/js/app.jsx --output ./Project1/dist/js/main.js",
    "watch": "webpack --watch --mode development",
    "start": "webpack-dev-server --mode development --open --watch-content-base ./Project1/js/app.jsx"  //watching desired files changes live in browser
  },
  "devDependencies": {
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.4",
    "babel-preset-env": "^1.7.0",
    "babel-preset-react": "^6.24.1",
    "babel-preset-stage-2": "^6.24.1",
    "css-loader": "^0.28.11",
    "html-loader": "^0.5.5",
    "html-webpack-plugin": "^3.2.0",
    "mini-css-extract-plugin": "^0.4.0",
    "node-sass": "^4.9.0",
    "postcss-loader": "^2.1.5",
    "prop-types": "^15.6.1",
    "react": "^16.3.2",
    "react-dom": "^16.3.2",
    "sass-loader": "^7.0.1",
    "webpack": "^4.8.3",
    "webpack-cli": "^2.1.3",
    "webpack-dev-server": "^3.1.4"
  }
}

其中--mode production | developement | none表示对文件夹中的输出文件进行格式化优化dist，或者不进行此类优化，以提高可读性none

webpack.config.js

const HtmlWebPackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

module.exports = {
  module: {
    rules: [
      {
        test: /\.(js$|jsx$)/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.html$/,
        use: [
          { 
            loader: 'html-loader',
            options: { minimize: true } 
          }
        ]
      },
      {
        test: /\.(png|jpe?g)/i,
        use: [
          {
            loader: 'url-loader',
            options: {
              name: './img/[name].[ext]',
              limit: 10000
            }
          },
          {
            loader: 'img-loader'
          }
        ]
      },
      {
        test: /\.(css$|scss$)/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          'postcss-loader',
          'sass-loader'
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: './Project1/index.ejs',     // entry point for html
      filename: 'index.html'
    }),
    new MiniCssExtractPlugin({
      filename: '[name].css',
      chunkFilename: '[id].css'
    })
  ],
  watchOptions: {                   //added to make possible watch files
    ignored: /node_modules/,
    aggregateTimeout: 300,
    poll: 1000
  }
};

扩展名更改为index.html的自定义入口点，用于解决 和 之间引起的一些问题。使用 .ejs 时，输出 html 也会自动放置在 dist 文件夹中，未针对格式进行优化并且可读。注意 html.ejs 是否包含带有 [out].js 文件固定路径的标记（此处是在 dist 文件夹中生成的）。从 dist 文件夹生成的 index.html 将添加另一个这样的行，因此它将加倍 -> 要删除的行。.html.ejshtml-loaderhtml-webpack-plugin

用于运行：npm run build，npm start