IE11 - 未处理的 Promise 拒绝：语法错误

Question

我正在开发 Angular 2 应用程序，并且第一次添加了一些 async/await 功能。在本地一切正常，但一旦部署在我的测试服务器上，我在 IE11 中收到此错误（请参阅问题底部以获取完整的浏览器堆栈跟踪）：

Unhandled Promise rejection: Syntax error

错误发生在 Angular2 应用程序正在加载时，而不是方法执行时。错误指向这个方法（它也恰好是这个组件中唯一的方法）。

我的-component.ts

async logoff(event: { preventDefault: () => void }) {
    event.preventDefault();
    await this.authService.logoff();
    window.location.href = '/Account/Login';
}

我是第一次介绍async/await所以我知道这是失败的地方。

测试步骤

我使用 Visual Studio 将发布版本发布到我的本地 IIS。香料是：
- Windows 10 (x64)
- IIS
然后我运行在我发布的目录中安装生产环境所需的 npm 包
```
npm i --production
```
我打开 IE11 浏览器和运行来自 IIS 的应用程序 一切正常，没有错误.
然后我制作了我发布的目录的完整副本并将其复制到我的测试服务器。测试服务器spces是：
- Windows 2012 R2 标准
- IIS
然后我在我以前使用的开发机器上使用相同的 IE11 浏览器实例浏览到该站点并收到上述错误。

那么，为什么当我从我的测试服务器上运行它会失败，而当我从我的本地机器运行它时它不会失败？ 有吗一个必需的节点或 NPM module/package 需要全局安装以使垫片从 IE11 正常工作，或者是否存在其他问题？我在这里不知所措。

配置

如果有什么我可以补充的，请告诉我，我会更新问题。

tsconfig.js

根据recommended configuration

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": [ "es2015", "dom" ],
    "removeComments": false,
    "noImplicitAny": false,
    "suppressImplicitAnyIndexErrors": true
  },
  "compileOnSave": true
}

package.json

  "dependencies": {
    "@angular/common": "2.4.8",
    "@angular/compiler": "2.4.8",
    "@angular/core": "2.4.8",
    "@angular/forms": "2.4.8",
    "@angular/http": "2.4.8",
    "@angular/platform-browser": "2.4.8",
    "@angular/platform-browser-dynamic": "2.4.8",
    "@angular/router": "3.4.8",
    "core-js": "~2.4.1",
    "jquery": "~3.1.1",
    "lodash": "^4.17.4",
    "reflect-metadata": "^0.1.9",
    "rxjs": "5.2.0",
    "systemjs": "0.20.9",
    "zone.js": "^0.7.7"
  }

Index.html（仅限脚本）

<script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/2.4.1/shim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/5.0.1/Rx.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/zone.js/0.7.7/zone.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/reflect-metadata/0.1.8/Reflect.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js"></script>
<script>
    System.import('system-config.js')
        .then(function() {
            System.import('main');
        })
        .catch(console.error.bind(console));
</script>

完整的客户端堆栈跟踪

Unhandled Promise rejection: Syntax error
  Evaluating http://mytest.server.domain/Scripts/my-component.js
  Evaluating http://mytest.server.domain/Scripts/app.module.js
  Evaluating http://mytest.server.domain/Scripts/main.js
  Loading main ; Zone: <root> ; Task: Promise.then ; Value: Error: Syntax error
  Evaluating http://mytest.server.domain/Scripts/my-component.js
  Evaluating http://mytest.server.domain/Scripts/app.module.js
  Evaluating http://mytest.server.domain/Scripts/main.js
  Loading main SyntaxError: Syntax error
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:25003)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:5:224)
   at j (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7593)
   at S (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7059)
   at x (https://cdnjs.cloudflare.com/a
   "Unhandled Promise rejection:"
   "Syntax error
  Evaluating http://mytest.server.domain/Scripts/my-component.js
  Evaluating http://mytest.server.domain/Scripts/app.module.js
  Evaluating http://mytest.server.domain/Scripts/main.js
  Loading main"
   "; Zone:"
   "<root>"
   "; Task:"
   "Promise.then"
   "; Value:"
   {
      [functions]: ,
      __proto__: { },
      __zone_symbol__error: { },
      __zone_symbol__message: "Syntax error
  Evaluating http://mytest.server.domain/Scripts/my-component.js
  Evaluating http://mytest.server.domain/Scripts/app.module.js
  Evaluating http://mytest.server.domain/Scripts/main.js
  Loading main",
      __zone_symbol__number: undefined,
      description: "Syntax error
  Evaluating http://mytest.server.domain/Scripts/my-component.js
  Evaluating http://mytest.server.domain/Scripts/app.module.js
  Evaluating http://mytest.server.domain/Scripts/main.js
  Loading main",
      message: "Syntax error
  Evaluating http://mytest.server.domain/Scripts/my-component.js
  Evaluating http://mytest.server.domain/Scripts/app.module.js
  Evaluating http://mytest.server.domain/Scripts/main.js
  Loading main",
      name: "Error",
      number: undefined,
      originalErr: { },
      originalStack: undefined,
      stack: "SyntaxError: Syntax error
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:25003)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:5:224)
   at j (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7593)
   at S (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7059)
   at x (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6096)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6268)
   at Anonymous function (eval code:20:1)
   at Anonymous function (eval code:1:31)
   at eval code (eval code:1:2)
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:25003)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:5:224)
   at j (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7593)
   at S (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7059)
   at x (",
      Symbol()_n.tcfyoms51l2: undefined,
      Symbol()_o.tcfyoms51l2: undefined,
      Symbol()_p.tcfyoms51l2: undefined,
      Symbol()_q.tcfyoms51l2: undefined,
      Symbol()_r.tcfyoms51l2: undefined,
      Symbol()_s.tcfyoms51l2: undefined,
      Symbol()_t.tcfyoms51l2: undefined,
      Symbol()_u.tcfyoms51l2: undefined,
      Symbol(rxSubscriber)_m.tcfyoms51l2: undefined,
      zoneAwareStack: undefined
   }
   "SyntaxError: Syntax error
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:25003)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:5:224)
   at j (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7593)
   at S (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7059)
   at x (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6096)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6268)
   at Anonymous function (eval code:20:1)
   at Anonymous function (eval code:1:31)
   at eval code (eval code:1:2)
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:25003)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:5:224)
   at j (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7593)
   at S (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7059)
   at x ("

Error: Uncaught (in promise): Error: Syntax error
  Evaluating http://mytest.server.domain/Scripts/my-component.js
  Evaluating http://mytest.server.domain/Scripts/app.module.js
  Evaluating http://mytest.server.domain/Scripts/main.js
  Loading main
SyntaxError: Syntax error
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:25003)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:5:224)
   at j (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7593)
   at S (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7059)
   at x (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6096)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6268)
   at Anonymous function (eval code:20:1)
   at Anonymous function (eval code:1:31)
   at eval code (eval code:1:2)
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/sys
   {
      [functions]: ,
      __proto__: { },
      __zone_symbol__error: { },
      __zone_symbol__number: undefined,
      description: "Uncaught (in promise): Error: Syntax error
  Evaluating http://mytest.server.domain/Scripts/my-component.js
  Evaluating http://mytest.server.domain/Scripts/app.module.js
  Evaluating http://mytest.server.domain/Scripts/main.js
  Loading main
SyntaxError: Syntax error
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:25003)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:5:224)
   at j (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7593)
   at S (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7059)
   at x (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6096)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6268)
   at Anonymous function (eval code:20:1)
   at Anonymous function (eval code:1:31)
   at eval code (eval code:1:2)
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0",
      message: "Uncaught (in promise): Error: Syntax error
  Evaluating http://mytest.server.domain/Scripts/my-component.js
  Evaluating http://mytest.server.domain/Scripts/app.module.js
  Evaluating http://mytest.server.domain/Scripts/main.js
  Loading main
SyntaxError: Syntax error
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:25003)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:5:224)
   at j (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7593)
   at S (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7059)
   at x (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6096)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6268)
   at Anonymous function (eval code:20:1)
   at Anonymous function (eval code:1:31)
   at eval code (eval code:1:2)
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0",
      name: "Error",
      number: undefined,
      originalStack: undefined,
      promise: { },
      rejection: { },
      stack: "Error: Uncaught (in promise): Error: Syntax error
  Evaluating http://mytest.server.domain/Scripts/my-component.js
  Evaluating http://mytest.server.domain/Scripts/app.module.js
  Evaluating http://mytest.server.domain/Scripts/main.js
  Loading main
SyntaxError: Syntax error
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:25003)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:5:224)
   at j (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7593)
   at S (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:7059)
   at x (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6096)
   at Anonymous function (https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.20.9/system.js:4:6268)
   at Anonymous function (eval code:20:1)
   at Anonymous function (eval code:1:31)
   at eval code (eval code:1:2)
   at Pe (https://cdnjs.cloudflare.com/ajax/libs/sys",
      Symbol()_n.tcfyoms51l2: undefined,
      Symbol()_o.tcfyoms51l2: undefined,
      Symbol()_p.tcfyoms51l2: undefined,
      Symbol()_q.tcfyoms51l2: undefined,
      Symbol()_r.tcfyoms51l2: undefined,
      Symbol()_s.tcfyoms51l2: undefined,
      Symbol()_t.tcfyoms51l2: undefined,
      Symbol()_u.tcfyoms51l2: undefined,
      Symbol(rxSubscriber)_m.tcfyoms51l2: undefined,
      task: { },
      zone: { },
      zoneAwareStack: undefined
   }

Answer 1

检查发挥作用的各种缓存：IE 和您的 CDN；您可能正在加载旧的缓存副本

IE11 - 未处理的 Promise 拒绝：语法错误

IE11 - Unhandled Promise rejection: Syntax error

typescript

internet-explorer-11

es6-promise

angular

测试步骤

配置