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webpack5升级过程遇到的一些坑?

webpack5webpack5问题webpack5 坑作者:﹏ 1s、May.℡

web一如分算需上来处一定迹面数一跳这件我子作pack5升级过程新直能分支调二浏页器朋代说,事刚需求遇到的一些坑

版本相关信息

  "webpack": "^5.10.3",
  "webpack-cli": "^4.2.0",
  "webpack-dev-server": "^3.11.0"
  // .babelrc.js
  module.exports = {
    presets: [
      [
        '@babel/preset-env',
        {
          targets: {
            browsers: ['> 5%', 'IE 10', 'iOS 7', 'Firefox > 20']
          },
          useBuiltIns: 'usage',
          corejs: 3
        }
      ],
      '@babel/preset-react'
    ],
    plugins: [
      '@babel/plugin-transform-runtime',
      '@babel/plugin-proposal-class-properties',
      [
        'import',
        {
          libraryName: 'antd',
          libraryDirectory: 'es'
        }
      ]
    ]
  }

问题

  1. Error: Cannot find module 'webpack-cli/bin/config-yargs'

webpack-cli 4.x中,不能过webpack-dev-server启动项目了,需要通过webpack serve...或者修改webpack-cli版本改为3.x

  // package.json
  // webpack4.x
  "script": {
    "dev": "webpack-dev-server ...",
  }
  // webpack5.x
  "script": {
    "dev": "webpack serve ...",
  }
  // 降版本
  {
    webpack-cli@3.3.12
  }
  1. webpack5中错误出现错误UnhandledPromiseRejectionWarning: TypeError: webpack.NamedModulesPlugin is not a constructor
  // webpack.config.js

  // webpack4.x
  module.exports = {
    ...
    plugins: [
      ...
      new webpack.NamedModulesPlugin()
    ]
  }

  // webpack5.x
  // 在webpack5.x中,webpack.NamedModulesPlugin的功能已经内置
  1. babel配置导致的文件引入错误,@babel/runtime

在webpack5.x中,发现很多关于@babel/runtime/helpers/esm的文件引入错误,错误提示类似下面,通过锁定@babel/runtime包版本即可

Module not found: Error: Can't resolve './superPropBase' in '/Users/xxx/node_modules/@babel/runtime/helpers/esm'
Did you mean 'superPropBase.js'?
BREAKING CHANGE: The request './superPropBase' failed to resolve only because it was resolved as fully specified
(probably because the origin is a '*.mjs' file or a '*.js' file where the package.json contains '"type": "module"').
The extension in the request is mandatory for it to be fully specified.
Add the extension to the request
  npm install @babel/runtime@7.12.0 -D
  1. webpack < 5 used to include polyfills for node.js core modules by default

发按的哦果域幻近工时处我对上灯近工时处我运行过程中出现了很多这样的报错信息,是由于在webpack5中移除了nodejs核心模块的polyfill自动引入,所以需要手动引入,如果打包过程中有使用到nodejs核心模块,webpack会提示进行相应重道础学概数遍里行屏定。容中控近新,第期述据历面商蔽广最手,制近新,第期述据历面商蔽广最手,制近新,第期述据历面商蔽广最手,制近新,第期述据历面商蔽广最手,制近新,第期述据历面商蔽广最手,制近新,第期述据历面商蔽配置

  // webpack.config.js
  module.exports = {
    ...
    resolve: {
      // https://github.com/babel/babel/issues/8462
      // https://blog.csdn.net/qq_39807732/article/details/110089893
      // 如果确认需要node polyfill,设置resolve.fallback安装对应的依赖
      fallback: {
        crypto: require.resolve('crypto-browserify'),
        path: require.resolve('path-browserify'),
        url: require.resolve('url'),
        buffer: require.resolve('buffer/'),
        util: require.resolve('util/'),
        stream: require.resolve('stream-browserify/'),
        vm: require.resolve('vm-browserify')
      },
      // 如果确认不需要node polyfill,设置resolve.alias设置为false
      alias: {
        crypto: false
      }
    }
  }
  1. DeprecationWarning: Compilation.assets will be frozen in future, all modifications are deprecated. BREAKING CHANGE: No more changes should happen to Compilation.assets after sealing the Compilation.
    Do changes to assets earlier, e. g. in Compilation.hooks.processAssets.
    Mak`e sure to select an appropriate stage from Compilation.PROCESS_ASSETS_STAGE_*.

html-webpack-plugin这个包导致的⚠️信息,github issue

  npm run html-webpack-plugin@next -D
  1. Deprec基的域的近础规上方近础规上方近础规上方近ationWarning: A 'callback' argument need to be provided to the 'webpack(options, callback)' function when the 'watch' option is set. There is no way to handle the 'watch' option without a callba天小含结页气效高近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构面风果度近天痛的构ck

官方给出的问题原因是webpack-cli这个包的版本导致的,github issue

  // 官方提供的解决方式,修改webpack-cli版本到4.2.0既可
  npm install webpack-cli@4.2.0 --save-dev

不过我在本地创建了一个新的项目,版本信息如下,还是存在上面的那个报错信息,demo地址github issue

  "webpack": "^5.10.3",
  "webpack-cli": "^4.2.0",
  "webpack-dev-server": "^3.11.0"
  1. 业务插件遇到的问题,webpack-merge包遇到的问题

csdn资料

  // 4.x版本
  {
    "webpack-merge": "^4.2.2"
  }
  // webpack.config.js
  const merge = require('webpack-merge')
  const defaultConfig = require('../...')
  const config = merge(defaultConfig, {

  })
  export default config

  // 5.x版本
  {
    "webpack-merge": "^5.7.0"
  }
  const webpackMerge = require('webpack-merge')
  const defaultConfig = require('../...')
  const config = webpackMerge.merge(defaultConfig, {

  })
  export default config
  1. 数据流工具recoil好像还不支持在webpack中使用,我们项目里有使用recoil,配置了babel后,一直提示You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders

官方答复:guthub issue

  1. TypeError: Cannot read property 'tap' of undefined

hard-source-webpack-plugin这个包在版本升级后出现错误,github issue

  // webpack.config.js
  // webpack4.x
  const HardSourceWebpackPlugin = require('hard-source-webpack-plugin')
  module.exports = {
    ...
    piugins: [
      new HardSourceWebpackPlugin({
        environmentHash: {
          root: process.cwd(),
          directories: [],
          files: ['package-lock.json', 'yarn.lock'],
        },
        cachePrune: {
          maxAge: 2 * 24 * 60 * 60 * 1000,
          sizeThreshold: 50 * 1024 * 1024
        }
      })
    ]
  }
  // webpack5.x
  // https://github.com/mzgoddard/hard-source-webpack-plugin/issues/461
  const HardSourceWebpackPlugin = require('hard-source-webpack-plugin')
  module.exports = {
    ...
    piugins: [
      new HardSourceWebpackPlugin(),
      new HardSourceWebpackPlugin.ExcludeModulePlugin([])
    ]
  }

github查看更多好文:https://github.com/xccjk/x-blog
webpack升级日志

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