asp.net - Angular 2 使用 RequireJS 的導入錯誤

我無法導入 Angular2/core，因為出現以下錯誤：

Module name "angular2/core" has not been loaded yet for context: _. Use require([])

這是我的 Typescript 檔案：

import {Component, View} from "angular2/core";
import {bootstrap} from "angular2/platform/browser";
@Component({
          selector: "menu"
})
class MenuComponent {
isActive(path: string) {
    return true
   }
}
bootstrap(MenuComponent);

使用此配置編譯的有：

{  
  "compilerOptions": {
    "noImplicitAny": false,
    "noEmitOnError": true,
    "removeComments": true,
    "sourceMap": true,
    "target": "es5",
    "module": "commonjs",
    "outDir": "../wwwroot/js",
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
  },  
  "exclude": [
    "node_modules",
    "wwwroot"
  ]
}

這是編譯後的 Javascript 檔案：

var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
var core_1 = require("angular2/core");
var browser_1 = require("angular2/platform/browser");
var MenuComponent = (function () {
function MenuComponent() {
}
MenuComponent.prototype.isActive = function (path) {
    var page = window.location.pathname;
    if (path === undefined || path === '') {
        path = '';
    }
    var result = path === '' ? path === page[page.length - 1] : page[page.length - 1].indexOf(path) > -1;
    return result;
};
MenuComponent = __decorate([
    core_1.Component({
        selector: "menu"
    }), 
    __metadata('design:paramtypes', [])
], MenuComponent);
return MenuComponent;
})();
browser_1.bootstrap(MenuComponent);
//# sourceMappingURL=menu.js.map

我的 JavaScript 是按這個順序匯入的：

<script type="text/javascript" src="~/lib/requirejs/require.js"></script>
<script type="text/javascript" src="~/lib/angular2-polyfills.js"></script>
<script type="text/javascript" src="~/lib/es6-shim.js"></script>
<script type="text/javascript" src="~/lib/system-polyfills.js"></script>
<script type="text/javascript" src="~/lib/angular2-polyfills.js"></script>
<script type="text/javascript" src="~/lib/system.src.js"></script>
<script type="text/javascript" src="~/lib/rx.js"></script>
<script type="text/javascript" src="~/lib/angular2.js"></script>
<script type="text/javascript" src="~/js/menu.js"></script>

我在想是什麼原因導致上述錯誤。因為我無法更改由 Typescript 文件編譯而來的 Javascript 代碼。

我也在使用 Visual Studio 2015 和 ASP.Net 5。我知道 Angular 2 還在測試版，而 ASP.Net 5 還在 RC 版本，但我懷疑這個組合會造成問題。

謝謝你的幫助。

答案＃1

我認為你使用了兩個模組加載器，RequireJS 和 SystemJS。看看你在 HTML 文件中包含了什麼：

<script type="text/javascript" src="~/lib/requirejs/require.js"></script> <------
<script type="text/javascript" src="~/lib/angular2-polyfills.js"></script>
<script type="text/javascript" src="~/lib/es6-shim.js"></script>
<script type="text/javascript" src="~/lib/system-polyfills.js"></script>
<script type="text/javascript" src="~/lib/angular2-polyfills.js"></script>
<script type="text/javascript" src="~/lib/system.src.js"></script> <------
<script type="text/javascript" src="~/lib/rx.js"></script>
<script type="text/javascript" src="~/lib/angular2.js"></script>
<script type="text/javascript" src="~/js/menu.js"></script>

你只需要一個。例如 SystemJS。這就是訊息的原因。兩個庫都試圖加載 angular2/core 模組…

編輯

如果你只想使用 SystemJS，你可以更新你的 tsconfig.json 文件：

{  
  "compilerOptions": {
    "noImplicitAny": false,
    "noEmitOnError": true,
    "removeComments": true,
    "sourceMap": true,
    "target": "es5",
    "module": "system",  <--------
    "moduleResolution": "node",   <--------
    "outDir": "../wwwroot/js",
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true
  },  
  "exclude": [
    "node_modules",
    "wwwroot"
  ]
}

希望這對你有幫助，Thierry