SCRIPT1002：使用React + Babel + Webpack在IE11中出现语法错误 [英] SCRIPT1002: Syntax error in IE11 with React + Babel + Webpack

问题描述

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，因此此处不使用 create-react-app 。

I'm trying to get my React App with ES2015 functionalities running in IE >= 11 using Webpack + Babel. The setup is custom, using the inferno-compat layer, so no create-react-app used here.

但是 - 尽管应用了最新的 babel-polyfill 和 babel-preset-env 练习到我的 .babelrc 和webpack配置，尝试时我的bundle.js中仍然出现 SCRIPT1002：语法错误使用IE11访问应用程序。

However - despite applying the latest babel-polyfill and babel-preset-env practices to my .babelrc and webpack config, I still get a SCRIPT1002: Syntax error within my bundle.js when trying to access the app with IE11.

当我按照IEs控制台中的语法错误引用时，这是生成的bundle.js中相互冲突的部分（箭头函数）特别是）：

When I follow the syntax error reference in IEs console, this is the part within the generated bundle.js that's conflicting (the arrow-function in particular):

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

  return x + y;
}

这些是我的 package.json中的相关依赖项：

"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"]
        }
      }
    ]
  ]
}

我在 webpack.base.config.js babel-polyfill c>这里：

I include the babel-polyfill within my webpack.base.config.js here:

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

为了让它在IE11中运行而缺少什么想法？

Any ideas what's missing to get it running in IE11?

推荐答案

我发现了这个问题。我正在使用模块 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） - 更具体地说是箭头函数 => 直接包含在我的bundle.js中。 IE11当然不能执行箭头函数或任何其他ES6语法。

I found the issue. I'm using the module rambdax as one of my devDependencies, which contains source code written in ES6 syntax (not transpiled to ES5) - more specifically arrow-functions => that are directly included within my bundle.js. IE11 of course can't execute arrow-functions or any other ES6 syntax.

不幸的是，编译时，Babel和Webpack（UglifyJS插件）都不会触及导入的node_modules的源代码。 bundle.js，表示：作为ES6导入的模块源代码将保留在webpack中的ES6 bundle.js 。

Unfortunately neither Babel nor Webpack (UglifyJS Plugin) will touch the source of imported node_modules when compiling the bundle.js, which means: Module source code that gets imported as ES6 will remain ES6 in your webpack bundle.js.

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

See https://github.com/facebookincubator/create-react-app/issues/1125 for more information on this topic.

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

I also already filed an issue regarding this problem within the ´rambdax´ repository. You can find out more about it there: https://github.com/selfrefactor/rambdax/issues/4

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