vue-cli 2.0打包后在ie11下报错

Question

问题说明

1. vue-cli打包后代码ie 11报错，无法打开页面（项目两个页面，登录页可以打开，主页无法打开）。
2. 稍显奇怪的是，npm run dev启的开发时服务是可以在ie下正常运行的，但是打包后会报错。

报错原因说明

打包后的压缩文件存在class语法，但是我在[该压缩文件].map中发现有文件用了es6的class api。

其他说明

• webpack.base.conf.js打包时babel转换配置未做修改

  module: {
    rules: [
      ...(config.dev.useEslint ? [createLintingRule()] : []),
      {
        test: /\.vue$/,
        loader: 'vue-loader',
        options: vueLoaderConfig
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        include: [resolve('src'), resolve('test'), resolve('node_modules/webpack-dev-server/client')]
      },
      // 更多...

• 打包设置了两个入口文件，应该是不影响这个问题的

entries() =>
{
    login: 'path1',
    main: 'path2'
}

• 两个入口都有import 'babel-polyfill'用于转换es6新增api

• webpack.prod.conf.js

  'use strict'
  const path = require('path')
  const utils = require('./utils')
  const webpack = require('webpack')
  const config = require('../config')
  const merge = require('webpack-merge')
  const baseWebpackConfig = require('./webpack.base.conf')
  const CopyWebpackPlugin = require('copy-webpack-plugin')
  const HtmlWebpackPlugin = require('html-webpack-plugin')
  const ExtractTextPlugin = require('extract-text-webpack-plugin')
  const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
  const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
  
  const env = require('../config/prod.env')
  
  const webpackConfig = merge(baseWebpackConfig, {
    module: {
      rules: utils.styleLoaders({
        sourceMap: config.build.productionSourceMap,
        extract: true,
        usePostCSS: true
      })
    },
    devtool: config.build.productionSourceMap ? config.build.devtool : false,
    output: {
      path: config.build.assetsRoot,
      filename: utils.assetsPath('js/[name].[chunkhash].js'),
      chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
    },
    plugins: [
      // http://vuejs.github.io/vue-loader/en/workflow/production.html
      new webpack.DefinePlugin({
        'process.env': env
      }),
      new UglifyJsPlugin({
        uglifyOptions: {
          compress: {
            warnings: false
          }
        },
        sourceMap: config.build.productionSourceMap,
        parallel: true
      }),
      // extract css into its own file
      new ExtractTextPlugin({
        filename: utils.assetsPath('css/[name].[contenthash].css'),
        // Setting the following option to `false` will not extract CSS from codesplit chunks.
        // Their CSS will instead be inserted dynamically with style-loader when the codesplit chunk has been loaded by webpack.
        // It's currently set to `true` because we are seeing that sourcemaps are included in the codesplit bundle as well when it's `false`,
        // increasing file size: https://github.com/vuejs-templates/webpack/issues/1110
        allChunks: true,
      }),
      // Compress extracted CSS. We are using this plugin so that possible
      // duplicated CSS from different components can be deduped.
      new OptimizeCSSPlugin({
        cssProcessorOptions: config.build.productionSourceMap
          ? { safe: true, map: { inline: false } }
          : { safe: true }
      }),
      // generate dist index.html with correct asset hash for caching.
      // you can customize output by editing /index.html
      // see https://github.com/ampedandwired/html-webpack-plugin
      // new HtmlWebpackPlugin({
      //   filename: config.build.index,
      //   template: 'index.html',
      //   inject: true,
      //   minify: {
      //     removeComments: true,
      //     collapseWhitespace: true,
      //     removeAttributeQuotes: true
      //     // more options:
      //     // https://github.com/kangax/html-minifier#options-quick-reference
      //   },
      //   // necessary to consistently work with multiple chunks via CommonsChunkPlugin
      //   chunksSortMode: 'dependency'
      // }),
  
      // keep module.id stable when vendor modules does not change
      new webpack.HashedModuleIdsPlugin(),
      // enable scope hoisting
      new webpack.optimize.ModuleConcatenationPlugin(),
      // split vendor js into its own file
      new webpack.optimize.CommonsChunkPlugin({
        name: 'vendor',
        minChunks (module) {
          // any required modules inside node_modules are extracted to vendor
          return (
            module.resource &&
            /\.js$/.test(module.resource) &&
            module.resource.indexOf(
              path.join(__dirname, '../node_modules')
            ) === 0
          )
        }
      }),
      // extract webpack runtime and module manifest to its own file in order to
      // prevent vendor hash from being updated whenever app bundle is updated
      new webpack.optimize.CommonsChunkPlugin({
        name: 'manifest',
        minChunks: Infinity
      }),
      // This instance extracts shared chunks from code splitted chunks and bundles them
      // in a separate chunk, similar to the vendor chunk
      // see: https://webpack.js.org/plugins/commons-chunk-plugin/#extra-async-commons-chunk
      new webpack.optimize.CommonsChunkPlugin({
        name: 'app',
        async: 'vendor-async',
        children: true,
        minChunks: 3
      }),
  
      // copy custom static assets
      new CopyWebpackPlugin([
        {
          from: path.resolve(__dirname, '../static'),
          to: config.build.assetsSubDirectory,
          ignore: ['.*']
        }
      ])
    ].concat(utils.htmlPlugin())
  })
  
  if (config.build.productionGzip) {
    const CompressionWebpackPlugin = require('compression-webpack-plugin')
  
    webpackConfig.plugins.push(
      new CompressionWebpackPlugin({
        asset: '[path].gz[query]',
        algorithm: 'gzip',
        test: new RegExp(
          '\\.(' +
          config.build.productionGzipExtensions.join('|') +
          ')$'
        ),
        threshold: 10240,
        minRatio: 0.8
      })
    )
  }
  
  if (config.build.bundleAnalyzerReport) {
    const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
    webpackConfig.plugins.push(new BundleAnalyzerPlugin())
  }
  
  module.exports = webpackConfig    
  

性感程序员在线等答案ing

Answer 1

后面把 babel 升级到 7 并重新梳理了一遍关于 babel 的知识，就再也没遇到类似问题。

内容太多不便写在回答，具体信息请看 babel-loader 使用指南

Answer 2

把uglyfy去掉试试

PS： [该压缩文件].map 是source map的映射文件， 你在里面找东西能找到吗？

Answer 3

看一下 prod 的配置文件呢

Answer 4

查看项目根目录下的 .browserslistrc（ 或 package.json 中的 browserlist 选项），查看是否设置正确，一般用 Vue CLI 脚手架搭建的项目默认为：

> 1%
last 2 versions
not ie <= 8

如果设置了 ie <= 8 会正确转换成 es5 语法的。

Answer 5

您好，我遇到了和您一模一样的问题，在npm run dev下ie运行正常，打包后在运行就不行了，可否告知一下解决办法