更新一些依赖项后的 Webpack 错误

Question

我正在更新我的应用程序包，但在尝试更新到最新版本时遇到了一些错误。

我的项目在 http://localhost:8080/ 运行

这些是旧项目中的包，如果我使用它可以完美运行

   "autoprefixer": "^9.6.5",
    "postcss-loader": "^3.0.0",
    "webpack": "^4.41.2",
    "webpack-cli": "^3.3.9",
    "webpack-dev-server": "^3.11.0"

我正在尝试更新这些以公平对待最新版本：

"autoprefixer": "^10.1.0",
"postcss-loader": "^4.1.0",
"webpack": "^5.9.0",
"webpack-cli": "^4.2.0",
"webpack-dev-server": "^3.11.0"

我的 GitHub 代码：https://github.com/openbooknoobdeveloper/pizzareact

webpack.config.js

const path = require('path');
const autoprefixer = require('autoprefixer');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  mode: 'development',
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
    publicPath: ''
  },
  devtool: 'cheap-module-eval-source-map',
  module: {
    rules: [
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/
      },
      {
        test: /\.css$/,
        exclude: /node_modules/,
        use: [
          { loader: 'style-loader' },
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1,
              modules: {
                localIdentName: '[name]__[local]__[hash:base64:5]'
              }
            }
          },
          {
            loader: 'postcss-loader',
            options: {
              ident: 'postcss',
              plugins: () => [autoprefixer()]
            }
          }
        ]
      },
      {
        test: /\.(png|jpe?g|gif)$/,
        loader: 'url-loader?limit=8000&name=images/[name].[ext]'
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: __dirname + '/src/index.html',
      filename: 'index.html',
      inject: 'body'
    })
  ]
};

webpack.config.prod.js

const path = require('path');
const autoprefixer = require('autoprefixer');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  mode: 'production',
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
    publicPath: ''
  },
  devtool: 'none',
  module: {
    rules: [
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/
      },
      {
        test: /\.css$/,
        exclude: /node_modules/,
        use: [
          { loader: 'style-loader' },
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1,
              modules: {
                localIdentName: '[name]__[local]__[hash:base64:5]'
              }
            }
          },
          {
            loader: 'postcss-loader',
            options: {
              ident: 'postcss',
              plugins: () => [autoprefixer()]
            }
          }
        ]
      },
      {
        test: /\.(png|jpe?g|gif)$/,
        loader: 'url-loader?limit=8000&name=images/[name].[ext]'
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: __dirname + '/src/index.html',
      filename: 'index.html',
      inject: 'body'
    })
  ]
};

如果我更新软件包，我会在运行时收到此错误 npm start：

$ npm start

> react-complete-guide@1.0.0 start A:\github\LAB\test-webpack-version-pizza
> webpack-dev-server

'webpack-dev-server' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! react-complete-guide@1.0.0 start: `webpack-dev-server`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the react-complete-guide@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\PC\AppData\Roaming\npm-cache\_logs\2020-12-17T15_41_12_536Z-debug.log

Answer 1

您的问题是由将 webpack 4.x 迁移到 5.x 引起的。您必须更改启动脚本才能启动 webpack 开发服务器：https://webpack.js.org/guides/development/

"start": "webpack serve"

请注意您的进一步 npm 参数。