webpack + vuecli多页面打包基于（vue-template-admin）修改-阿里云开发者社区

遇见的问题TypeError: Cannot read property ‘tap’ of undefined

先看项目目录结构：关于项目的修改及改造再项目完事的时候会发布的

如果你也遇见这个问题的话这一篇博客应该完全可以解决

问题描述：

building for sit environment...D:\EVDownload\adminMPA\node_modules\script-ext-html-webpack-plugin\lib\plugin.js:50
      compilation.hooks.htmlWebpackPluginAlterAssetTags.tap(PLUGIN, alterAssetTags);
                                                        ^
TypeError: Cannot read property 'tap' of undefined
    at ScriptExtHtmlWebpackPlugin.compilationCallback (D:\EVDownload\adminMPA\node_modules\script-ext-html-webpack-plugin\lib\plugin.js:50:57)
    at SyncHook.eval [as call] (eval at create (D:\EVDownload\adminMPA\node_modules\tapable\lib\HookCodeFactory.js:19:10), <anonymous>:11:1)
    at SyncHook.lazyCompileHook (D:\EVDownload\adminMPA\node_modules\tapable\lib\Hook.js:154:20)
    at Compiler.newCompilation (D:\EVDownload\adminMPA\node_modules\webpack\lib\Compiler.js:504:26)
    at D:\EVDownload\adminMPA\node_modules\webpack\lib\Compiler.js:540:29
    at AsyncSeriesHook.eval [as callAsync] (eval at create (D:\EVDownload\adminMPA\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:6:1)
    at AsyncSeriesHook.lazyCompileHook (D:\EVDownload\adminMPA\node_modules\tapable\lib\Hook.js:154:20)
    at Compiler.compile (D:\EVDownload\adminMPA\node_modules\webpack\lib\Compiler.js:535:28)
    at D:\EVDownload\adminMPA\node_modules\webpack\lib\Compiler.js:274:11
    at Compiler.readRecords (D:\EVDownload\adminMPA\node_modules\webpack\lib\Compiler.js:402:11)
    at D:\EVDownload\adminMPA\node_modules\webpack\lib\Compiler.js:271:10
    at AsyncSeriesHook.eval [as callAsync] (eval at create (D:\EVDownload\adminMPA\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:6:1)
    at AsyncSeriesHook.lazyCompileHook (D:\EVDownload\adminMPA\node_modules\tapable\lib\Hook.js:154:20)
    at D:\EVDownload\adminMPA\node_modules\webpack\lib\Compiler.js:268:19
    at AsyncSeriesHook.eval [as callAsync] (eval at create (D:\EVDownload\adminMPA\node_modules\tapable\lib\HookCodeFactory.js:33:10), <anonymous>:15:1)
    at AsyncSeriesHook.lazyCompileHook (D:\EVDownload\adminMPA\node_modules\tapable\lib\Hook.js:154:20)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! admin@1.0.0 build:sit: `cross-env NODE_ENV=production env_config=sit node build/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the admin@1.0.0 build:sit 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\l\AppData\Roaming\npm-cache\_logs\2020-11-10T02_45_03_911Z-debug.log

这个问题全网只有两个人写过博客但是不适合我这个（我也不知道为啥）

如果你也有这样的问题可以尝试下：

第一篇博客解决办法发是 webpack 和 webpackServe 及 html-webpack-plugin 版本冲突这个直接去重写install 个版本就好了

博客链接： https://blog.csdn.net/qq_31290307/article/details/86158770

第二篇博客解决办法如下：

set “html-webpack-plugin”: “^4.0.0-alpha” => “4.0.0-alpha”

remove node_modules

remove package-lock.json

npm install

博客链接： https://www.cnblogs.com/ybz94/p/9625864.html

以上两篇博客如果还不能解决你的问题那你就跟着我走吧！以下是我的解决思路

第一点：检查入口文件是不是有多余的东西

打印结果如下：

对比图

在这里我们发现入口文件多了几个js 分别是 errorLog.js 和 permission.js

所以我们要做的操作是将多余的js删除

入口函数写法如下

//多入口配置
// 通过glob模块读取views文件夹下的所有对应文件夹下的js后缀文件，如果该文件存在
// 那么就作为入口处理
exports.entries = function() {
  var entryFiles = glob.sync(PAGE_PATH + '/*/*.js')
  // console.log(entryFiles ,'entryCha')
  var map = {}
  entryFiles.forEach((filePath) => {
        var filename = filePath.substring(filePath.lastIndexOf('\/') + 1, filePath.lastIndexOf('.'))
        map[filename] = filePath
  })
  delete map.errorLog ;
  delete map.permission ;
  console.log(map ,'map')
  return map
}

修改完入口文件后我再次打包发现问题依旧，别灰心继续搞， webpack 打包主要就是入口和出口接下来我们研究下出口文件函数我一开始写法如下：

//多页面输出配置
// 与上面的多页面入口配置相同，读取pages文件夹下的对应的html后缀文件，然后放入数组中
exports.htmlPlugin = function() {
  // let entryHtml = path.resolve(__dirname + '../dist/*.html')
  let entryHtml = glob.sync(PAGE_PATH + '/*/*.html')
  let arr = []
  entryHtml.forEach((filePath) => {
      let filename = filePath.substring(filePath.lastIndexOf('\/') + 1, filePath.lastIndexOf('.'))
      let conf = {
          // 模板来源
          template: filePath,
          // 文件名称
          filename: filename + '.html',
          // 页面模板需要加对应的js脚本，如果不加这行则每个页面都会引入所有的js脚本
          chunks: ['manifest', 'vendor', filename],
          inject: true,
          templateParameters: {
                BASE_URL: config.build.assetsPublicPath + config.build.assetsSubDirectory,
              },
      }
      if (process.env.NODE_ENV === 'production') {
          conf = merge(conf, {
              minify: {
                  removeComments: true,
                  collapseWhitespace: true,
                  removeAttributeQuotes: true
              },
              chunksSortMode: 'dependency'
          })
      }
      arr.push(new HtmlWebpackPlugin(conf))
  })
  console.log(arr , 'arr')
  return arr
}

我们看下打印的数据对不对

[
  HtmlWebpackPlugin {
    options: {
      template: 'D:/EVDownload/adminMPA/src/views/index/index.html',
      templateContent: false,
      templateParameters: [Object],
      filename: 'index.html',
      hash: false,
      inject: true,
      compile: true,
      favicon: false,
      minify: false,
      cache: true,
      showErrors: true,
      chunks: [Array],
      excludeChunks: [],
      chunksSortMode: 'auto',
      meta: {},
      title: 'Webpack App',
      xhtml: false
    },
    childCompilerHash: undefined,
    childCompilationOutputName: undefined,
    assetJson: undefined,
    hash: undefined,
    version: 4
  },
  HtmlWebpackPlugin {
    options: {
      template: 'D:/EVDownload/adminMPA/src/views/page/page.html',
      templateContent: false,
      templateParameters: [Object],
      filename: 'page.html',
      hash: false,
      inject: true,
      compile: true,
      favicon: false,
      minify: false,
      cache: true,
      showErrors: true,
      chunks: [Array],
      excludeChunks: [],
      chunksSortMode: 'auto',
      meta: {},
      title: 'Webpack App',
      xhtml: false
    },
    childCompilerHash: undefined,
    childCompilationOutputName: undefined,
    assetJson: undefined,
    hash: undefined,
    version: 4
  },
  HtmlWebpackPlugin {
    options: {
      template: 'D:/EVDownload/adminMPA/src/views/pagetwo/pagetwo.html',
      templateContent: false,
      templateParameters: [Object],
      filename: 'pagetwo.html',
      hash: false,
      inject: true,
      compile: true,
      favicon: false,
      minify: false,
      cache: true,
      showErrors: true,
      chunks: [Array],
      excludeChunks: [],
      chunksSortMode: 'auto',
      meta: {},
      title: 'Webpack App',
      xhtml: false
    },
    childCompilerHash: undefined,
    childCompilationOutputName: undefined,
    assetJson: undefined,
    hash: undefined,
    version: 4
  }
]

仔细瞅了一下，也没有大问题，但是当我打开config文件时发现我在这里竟然也设置了build路径【奔溃】，那么再重新修改下打包路径吧。

第一步在 webpack.dev.conf.js 里修改

plugins: [
    new webpack.DefinePlugin({
      'process.env': require('../config/dev.env')
    }),
    new webpack.HotModuleReplacementPlugin(),
    /* 在这开始插入代码*********************************************************/
    new htmlWebpackPlugin({
      filename : 'index.html',//输出的html路径
      template : 'index.html', //html模板路径
      //inject : 'head',  //js文件在head中，若为body则在body中
      inject : true,
      title : 'index',
      chunks : ['app'], //打包时只打包main和a的js文件，见entry，注意使用chunks时模板index.html文件里面不允许有script标签，即使注释掉也会报错
      templateParameters: {
        BASE_URL: config.dev.assetsPublicPath + config.dev.assetsSubDirectory
      }
    }),
  new htmlWebpackPlugin({
    filename : 'page.html',//输出的html路径
    template : 'page.html', //html模板路径
    //inject : 'head',  //js文件在head中，若为body则在body中
    inject : true,
    title : 'page',
    chunks : ['page'], //打包时只打包main和a的js文件，见entry，注意使用chunks时模板index.html文件里面不允许有script标签，即使注释掉也会报错
    templateParameters: {
      BASE_URL: config.dev.assetsPublicPath + config.dev.assetsSubDirectory
    }
  }),
  new htmlWebpackPlugin({
    filename : 'pagetwo.html',//输出的html路径
    template : 'pagetwo.html', //html模板路径
    //inject : 'head',  //js文件在head中，若为body则在body中
    inject : true,
    title : 'pagetwo',
    chunks : ['pagetwo'], //打包时只打包main和a的js文件，见entry，注意使用chunks时模板index.html文件里面不允许有script标签，即使注释掉也会报错
    templateParameters: {
      BASE_URL: config.dev.assetsPublicPath + config.dev.assetsSubDirectory
    }
  }),
  /* 在这结束插入代码*********************************************************/
    new webpack.NamedModulesPlugin(), // HMR shows correct file names in console on update.
    new webpack.NoEmitOnErrorsPlugin(),
    new CopyWebpackPlugin([
      {
        from: path.resolve(__dirname, '../static'),
        to: config.dev.assetsSubDirectory,
        ignore: ['.*']
      }
    ])
  ]

因为我这有三个动态项目目前插如三个 new htmlWebpackPlugin

在webpack.prod.conf.js 里修改如下

plugins: [
    // http://vuejs.github.io/vue-loader/en/workflow/production.html
    new webpack.DefinePlugin({
      'process.env': env
    }),
    // extract css into its own file
    new MiniCssExtractPlugin({
      filename: utils.assetsPath('css/[name].[contenthash:8].css'),
      chunkFilename: utils.assetsPath('css/[name].[contenthash:8].css')
    }),
    /* 开始插入代码 ************************************************/
    new HtmlWebpackPlugin({
      filename: config.build.app,
      template: 'index.html',
      inject: true,
      favicon: resolve('favicon.ico'),
      title: 'index',
      templateParameters: {
        BASE_URL: config.build.assetsPublicPath + config.build.assetsSubDirectory
      },
      chunks: ['manifest', 'vendor', 'app'],
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      }
      // default sort mode uses toposort which cannot handle cyclic deps
      // in certain cases, and in webpack 4, chunk order in HTML doesn't
      // matter anyway
    }),
    new HtmlWebpackPlugin({
      filename: config.build.page,
      template: 'page.html',
      inject: true,
      favicon: resolve('favicon.ico'),
      title: 'page',
      templateParameters: {
        BASE_URL: config.build.assetsPublicPath + config.build.assetsSubDirectory
      },
      chunks: ['manifest', 'vendor', 'page'],
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      }
      // default sort mode uses toposort which cannot handle cyclic deps
      // in certain cases, and in webpack 4, chunk order in HTML doesn't
      // matter anyway
    }),
    new HtmlWebpackPlugin({
      filename: config.build.pagetwo,
      template: 'pagetwo.html',
      inject: true,
      favicon: resolve('favicon.ico'),
      title: 'pagetwo',
      templateParameters: {
        BASE_URL: config.build.assetsPublicPath + config.build.assetsSubDirectory
      },
      chunks: ['manifest', 'vendor', 'pagetwo'],
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      }
      // default sort mode uses toposort which cannot handle cyclic deps
      // in certain cases, and in webpack 4, chunk order in HTML doesn't
      // matter anyway
    }),
      /* 结束插入代码 ************************************************/
    new ScriptExtHtmlWebpackPlugin({
      //`runtime` must same as runtimeChunk name. default is `runtime`
      inline: /runtime\..*\.js$/
    }),
    // keep chunk.id stable when chunk has no name
    new webpack.NamedChunksPlugin(chunk => {
      if (chunk.name) {
        return chunk.name
      }
      const modules = Array.from(chunk.modulesIterable)
      if (modules.length > 1) {
        const hash = require('hash-sum')
        const joinedHash = hash(modules.map(m => m.id).join('_'))
        let len = nameLength
        while (seen.has(joinedHash.substr(0, len))) len++
        seen.add(joinedHash.substr(0, len))
        return `chunk-${joinedHash.substr(0, len)}`
      } else {
        return modules[0].id
      }
    }),
    // keep module.id stable when vender modules does not change
    new webpack.HashedModuleIdsPlugin(),
    // copy custom static assets
    new CopyWebpackPlugin([
      {
        from: path.resolve(__dirname, '../static'),
        to: config.build.assetsSubDirectory,
        ignore: ['.*']
      }
    ])
  ] ,

在这里也插入代码（注释里有标记哦！！！！！！！！！！！）

好了现在在运行下吧看看效果咋样呢？

打包完成成功啦！

小记

这个bug 说白了问题的根点在出口文件这，为什么会在这呢 ? 相关文档有说是因为 webpack 新增 hook 属性造成的看的我迷迷糊糊的没明白大致就是说你的出口文件应该怎么设置啥的。哎！脑壳疼

为什么出口文件不能放在公共的utils 里呢？目前这样打包问题虽然解决但是每次的修改过于复杂（脑壳疼），如果有大神的话感谢指导下哈！！！后期我会把这个项目开源详细请到个人中心查看

再此特别鸣谢 @璠哥（一个温文尔雅的漂亮妹子） @劲琪（一个阳光帅气的小帅哥）

webpack + vuecli多页面打包基于（vue-template-admin）修改

遇见的问题TypeError: Cannot read property ‘tap’ of undefined

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webpack + vuecli多页面打包基于（vue-template-admin）修改

遇见的问题TypeError: Cannot read property ‘tap’ of undefined

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相关课程

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