SCRIPT1002:使用React + Babel + Webpack在IE11中出现语法错误

Question

我正在尝试使用Webpack + Babel在IE> = 11中运行ES2015功能的React App.设置是自定义的,使用inferno-compat图层,因此create-react-app这里没有使用.

但是 - 尽管将最新的babel-polyfill和babel-preset-env实践应用到我的.babelrc和webpack配置中,我仍然在尝试使用IE11访问应用程序时在我的bundle.js中收到SCRIPT1002:语法错误.

当我在IE控制台中遵循语法错误引用时,这是生成的bundle.js中相互冲突的部分(特别是箭头函数):

function add(x, y) {
  if (y === undefined) {
    return yHolder => add(x, yHolder);
  }

  return x + y;
}

这些是我的相关依赖package.json:

"dependencies": {
  "inferno-redux": "^3.10.1",
  "react": "^15.6.0",
  "react-dom": "^15.6.0",
  "react-ga": "^2.2.0",
  "react-swipeable": "^4.1.0",
  "redux": "^3.7.2",
  "redux-saga": "^0.16.0",
  "regenerator-runtime": "^0.11.0"
},
"devDependencies": {
  //... stuff

  "babel-cli": "^6.26.0",
  "babel-core": "^6.25.0",
  "babel-eslint": "^7.2.3",
  "babel-loader": "^7.1.1",
  "babel-plugin-inferno": "^3.2.0",
  "babel-plugin-module-resolver": "^2.7.1",
  "babel-plugin-transform-es2015-arrow-functions": "^6.22.0",
  "babel-plugin-transform-es2015-spread": "^6.22.0",
  "babel-plugin-transform-regenerator": "^6.26.0",
  "babel-plugin-transform-runtime": "^6.23.0",
  "babel-polyfill": "^6.26.0",
  "babel-preset-env": "^1.6.1",
  "babel-preset-es2015": "^6.24.1",
  "babel-preset-flow": "^6.23.0",
  "babel-preset-react": "^6.24.1",

  //... some more stuff

  "webpack": "^3.8.1",
  "webpack-bundle-analyzer": "^2.9.1",
  "webpack-dev-middleware": "^1.12.2",
  "webpack-dev-server": "^2.9.5",
  "webpack-manifest-plugin": "^1.3.2",
  "webpack-merge": "^4.1.1",
}

这是我的.babelrc:

{
  "presets": 
    [
    "react", 
    "flow",
    "es2015",
    [
      "env", { 
        "modules": "commonjs",
        "targets": {
          "browsers": ["last 2 versions", "ie >= 11"]
        }
      }
    ]
  ]
}

我包括babel-polyfill在我的webpack.base.config.js位置:

// ... stuff
entry: {
  index: ['babel-polyfill', './index.js'],
},
// ... more stuff

有什么想法让它在IE11中运行？

Answer 1

我发现了这个问题.我正在使用该模块rambdax作为我的devDependencies之一,其中包含用ES6语法编写的源代码(未转换为ES5) - 更具体地说=>是直接包含在我的bundle.js中的arrow函数.IE11当然不能执行箭头功能或任何其他ES6语法.

遗憾的是,Babel和Webpack(UglifyJS插件)在编译bundle.js时都不会触及导入的node_modules的源代码,这意味着:作为ES6导入的模块源代码将保留在Webpack中的ES6 bundle.js.

有关此主题的更多信息,请参阅https://github.com/facebookincubator/create-react-app/issues/1125.

我也已在'rambdax'存储库中提出了有关此问题的问题.你可以在那里找到更多相关信息:https://github.com/selfrefactor/rambdax/issues/4