javascript - 类型错误 : CleanwebpackPlugin is not a constructor

Question

我正在尝试通过 webpack-server-dev 预览一个 vue web 应用程序。我正在遵循本指南 https://medium.com/the-web-tub/creating-your-first-vue-js-pwa-project-22f7c552fb34

该指南解释说该插件用于删除 dist 目录中的旧文件和未使用的文件。我已经尝试将 const CleanWebpackPlugin = require('clean-webpack-plugin') 替换为 const { CleanWebpackPlugin } = require('clean-webpack-plugin') 其中一些帖子建议。我还尝试查看有关 https://github.com/johnagan/clean-webpack-plugin 的文档但没有成功，因为我对此很陌生。

当我尝试 npm run dev 时出现此错误

    new CleanWebpackPlugin(['dist']),
    ^

TypeError: CleanWebpackPlugin is not a constructor
    at module.exports (C:\Users\Eson\Desktop\pwa-vue-app-1\webpack.config.js:56:5)
    at handleFunction (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\prepareOptions.js:21:13)
    at prepareOptions (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\prepareOptions.js:9:5)
    at requireConfig (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:119:14)
    at C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:125:17
    at Array.forEach (<anonymous>)
    at module.exports (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:123:15)
    at Object.<anonymous> (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-dev-server\bin\webpack-dev-server.js:79:40)
    at Module._compile (internal/modules/cjs/loader.js:776:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)
    at startup (internal/bootstrap/node.js:283:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)

这是 webpack.config.js 文件

const path = require('path')

const { VueLoaderPlugin } = require('vue-loader')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const CleanWebpackPlugin = require('clean-webpack-plugin')

module.exports = (env, argv) => ({
  mode: argv && argv.mode || 'development',
  devtool: (argv && argv.mode || 'development') === 'production' ? 'source-map' : 'eval',

  entry: './src/app.js',

  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].js'
  },

  node: false,

  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader'
      },
      {
        test: /\.js$/,
        loader: 'babel-loader'
      },
      {
        test: /\.css$/,
        use: [
          'vue-style-loader',
          'css-loader'
        ],
        exclude: /\.module\.css$/
      }
    ]
  },

  resolve: {
    extensions: [
      '.js',
      '.vue',
      '.json'
    ],
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@': path.resolve(__dirname, 'src')
    }
  },

  plugins: [
    new CleanWebpackPlugin(['dist']),
    new VueLoaderPlugin(),
    new HtmlWebpackPlugin({
      template: path.resolve(__dirname, 'static', 'index.html'),
      inject: true
    }),
    new CopyWebpackPlugin([{
      from: path.resolve(__dirname, 'static'),
      to: path.resolve(__dirname, 'dist'),
      toType: 'dir'
    }])
  ],

  optimization: {
    splitChunks: {
      chunks: 'all',
      minSize: 30000,
      maxSize: 0,
      cacheGroups: {
        vendors: {
          test: /[\\/]node_modules[\\/]/,
          priority: -10
        },
        default: {
          minChunks: 2,
          priority: -20,
          reuseExistingChunk: true
        }
      }
    },
    runtimeChunk: {
      name: entrypoint => `runtime~${entrypoint.name}`
    },
    mangleWasmImports: true,
    removeAvailableModules: true,
    removeEmptyChunks: true,
    mergeDuplicateChunks: true
  },

  devServer: {
    compress: true,
    host: 'localhost',
    https: true,
    open: true,
    overlay: true,
    port: 9000
  }
});

这是我在使用文档中解释的正确导入时遇到的错误:

      throw new Error(`clean-webpack-plugin only accepts an options object. See:
      ^

Error: clean-webpack-plugin only accepts an options object. See:
            https://github.com/johnagan/clean-webpack-plugin#options-and-defaults-optional
    at new CleanWebpackPlugin (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\clean-webpack-plugin\dist\clean-webpack-plugin.js:27:13)
    at module.exports (C:\Users\Eson\Desktop\pwa-vue-app-1\webpack.config.js:56:5)
    at handleFunction (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\prepareOptions.js:21:13)
    at prepareOptions (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\prepareOptions.js:9:5)
    at requireConfig (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:119:14)
    at C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:125:17
    at Array.forEach (<anonymous>)
    at module.exports (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-cli\bin\utils\convert-argv.js:123:15)
    at Object.<anonymous> (C:\Users\Eson\Desktop\pwa-vue-app-1\node_modules\webpack-dev-server\bin\webpack-dev-server.js:79:40)
    at Module._compile (internal/modules/cjs/loader.js:776:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:829:12)
    at startup (internal/bootstrap/node.js:283:19) 

如果我删除 webpack.config.js 中的第 56 行，我可以毫无问题地运行 Web 应用程序，但我想了解此问题的根源

Answer 1

正确的方法是使用这个导入:

const { CleanWebpackPlugin } = require('clean-webpack-plugin');

然后不再传递带有分发文件夹的数组，而是将其更改为

plugins: [
     new CleanWebpackPlugin(),
     //...
]