使用 Webpack、Babel 和 React 的 IE11 中的语法错误

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【中文标题】使用 Webpack、Babel 和 React 的 IE11 中的语法错误【英文标题】:Syntax error in IE11 with Webpack, Babel and React 【发布时间】:2017-12-26 00:09:30 【问题描述】:

我在 Internet Explorer 11 中的 React + Redux 项目中遇到语法错误,但我不知道是什么原因造成的。

我正在使用 Webpack 和 Babel 来编译它。

我尝试使用 babel-polyfill 和 babel-es6-polyfill,但这没有帮助。

这是我得到的错误:

SCRIPT1002: Syntax error
File: app.js, Line: 70, Column: 1

第 70 行第 1 列是 Webpack 的 eval 开始的位置:

/***/ ),
/* 21 */,
/* 22 */
/***/ (function(module, exports, __webpack_require__) 

"use strict";
eval("\n\nObject.define... <- Line 70
^--- Column 1

这是我的webpack.config.js

'use strict';
// Include modules and plugins
const webpack = require('webpack');
const path = require('path');
const ExtractTextPlugin = require('extract-text-webpack-plugin');

// App and build directories
const APP_DIR = path.resolve(__dirname, 'src/');
const BUILD_DIR = path.resolve(__dirname, 'public');

// Extract sass from the application, see index.jsx
const extractSass = new ExtractTextPlugin(
    filename: 'css/[name].css'
);

// The config file to load
let env = (process.env.NODE_ENV || 'dev').toLowerCase();
let configFile = path.resolve(__dirname, 'config/config.' + env + '.json');

// Default config file if not found
const defaultConfigFile = path.resolve(__dirname, 'config/config.dev.json');

/*
 * Config to be injected into the app
 * Note that JSON files are parsed upon requiring
 */
let config;

/*
 * Get the actual config
 */
try 
    config = require(configFile);
    console.log('Loaded config file ' + configFile);
 catch (e) 
    config = require(defaultConfigFile);
    console.log('Fallen back to default config file');


// The actual webpack config
const webpackConfig = 
    entry: 
        // The app entry point
        app: APP_DIR + '/index.jsx',

        // Vendor files will be used for bundling, they will not be compiled into the app itself
        vendor: [
            'axios',
            'prop-types',
            'react',
            'reactstrap',
            'react-chartjs-2',
            'react-dom',
            'react-redux',
            'react-router',
            'react-router-dom',
            'redux',
            'sprintf-js',
        ]
    ,

    output: 
        path: BUILD_DIR,
        filename: 'js/app.js'
    ,

    module: 

        /*
         * These are loaders for webpack, these will assist with compilation
         */
        loaders: [
            
                /*
                 * Use Babel to compile JS and JSX files
                 * See .babelrc
                 */
                test: /\.jsx?/,
                include: APP_DIR,
                loader: 'babel-loader'
            
        ],
        rules: [
            
                /*
                 * Sass/Scss compilation rules
                 */
                test: /\.scss$/,
                use: extractSass.extract(
                    use: [
                        
                            loader: 'css-loader'
                        ,
                        
                            loader: 'sass-loader'
                        
                    ],
                    fallback: 'style-loader'
                )
            ,
            
                /*
                 * JS(X) compilation rules
                 * We need this, otherwise Webpack will crash during compile time
                 */
                test: /\.jsx?/,
                loader: 'babel-loader'
            
        ]
    ,
    plugins: [
        /*
         * The CommonsChunkPlugin is responsible to create bundles out of commonly used modules
          * E.g. React, React Dom, etc
         */
        new webpack.optimize.CommonsChunkPlugin(
            name: 'vendor', // See entry.vendor
            filename: 'js/vendor.bundle.js'
        ),
        extractSass
    ],
    externals: 
        /*
         * The config external will be available to the app by using require('config')
         */
        'config': JSON.stringify(config)
    ,
    devServer: 
        contentBase: BUILD_DIR,
        compress: true,
        port: 7600,
        inline: true,
    ,
;

if (env === 'production') 
    webpackConfig.devtool = 'hidden-source-map';
 else 
    webpackConfig.devtool = 'eval-source-map';


module.exports = webpackConfig;

还有我的依赖:

"dependencies": 
  "axios": "^0.16.1",
  "babel-core": "^6.24.0",
  "babel-loader": "^6.4.1",
  "babel-polyfill": "6.5.1",
  "babel-preset-es2015": "^6.24.0",
  "babel-preset-react": "^6.23.0",
  "babel-preset-stage-1": "^6.24.1",
  "chart.js": "^2.6.0",
  "cross-env": "^3.2.4",
  "css-loader": "^0.27.3",
  "enumify": "^1.0.4",
  "extract-text-webpack-plugin": "^2.1.0",
  "history": "^4.6.3",
  "ip": "^1.1.5",
  "lodash": "^4.17.4",
  "moment": "^2.18.1",
  "node-sass": "^4.5.1",
  "prop-types": "^15.5.10",
  "react": "^15.4.2",
  "react-addons-css-transition-group": "^15.5.2",
  "react-addons-transition-group": "^15.5.2",
  "react-chartjs-2": "^2.1.0",
  "react-dom": "^15.4.2",
  "react-js-pagination": "^2.1.0",
  "react-redux": "^5.0.4",
  "react-router": "^4.1.1",
  "react-router-dom": "^4.1.1",
  "reactstrap": "^4.5.0",
  "redux": "^3.6.0",
  "sass-loader": "^6.0.3",
  "sprintf-js": "^1.1.0",
  "style-loader": "^0.16.0",
  "webpack": "^2.3.2"
,
"devDependencies": 
  "eslint-plugin-react": "^6.10.3",
  "webpack-dev-server": "^2.5.1"

还有我的 .babelrc:


   "presets" : [
      "es2015",
      "react",
      "stage-1"
   ]

编辑 1

按照 BAANNENMANNFRAU 的回答,我添加了 babel-preset-env 并将我的 .babelrc 编辑为如下:


   "presets" : [
      [ "env", 
         "targets": 
            "browsers": [
               "last 5 versions",
               "ie >= 11"
            ]
         
      ],
      "es2015",
      "react",
      "stage-1"
   ]

这没有帮助,它仍然导致IE11中的错误。

【问题讨论】:

你运气好吗?我目前正在遇到同样的事情。我通过删除源映射进一步缩小了范围,但 babel-preset-env 似乎并没有包含它应该包含的内容。 在另一个主题***.com/a/50372766/7801987找到解决方案 【参考方案1】:

我知道已经过了一年多,但我认为问题出在您的 devtool 配置上:

webpackConfig.devtool = 'eval-source-map';

显然,IE11 不喜欢由 webpack 插入的 eval() 代码。使用webpackConfig.devtool = 'none'(或alternative values之一)应该可以解决它。

【讨论】:

【参考方案2】:

使用npm install babel-preset-env --save-dev 安装babel-preset-env 并在您的.babelrc 中使用以下配置:


  "presets" : [
    ["env", 
      "targets": 
        "browsers": ["last 2 versions", "ie >= 11"]
      
    ],
    "react",
  ]

您还可以从配置中删除以下部分:

        loaders: [
            
                /*
                 * Use Babel to compile JS and JSX files
                 * See .babelrc
                 */
                test: /\.jsx?/,
                include: APP_DIR,
                loader: 'babel-loader'
            
        ],

查看文档here

【讨论】:

我尝试了您的解决方案,但没有奏效,结果相同。我不得不排除babelrc: false,因为否则它不会编译。我在帖子中添加了我的.babelrc。不过谢谢你的帖子。 添加你的 babelrc 的东西。这是至关重要的信息。

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