Angular 2给出SystemJS找不到/ angular2 / http模块

Question

我为Angular 2创建了一个服务：

import {Injectable} from "angular2/core";
import {Http} from "angular2/http";
import {TaskModel} from "./tasks.model"

@Injectable()
export class TasksDataService {

  tasks:Array<any>;

  constructor(http:Http) {

    this.tasks = [
      new TaskModel("Dishes"),
      new TaskModel("Cleaning the garage"),
      new TaskModel("Mow the grass")
    ];
  }

  getTasks():Array<any> {
    return this.tasks;
  }
}

当我运行我的程序时，浏览器会显示：

system.src.js:1049 GET http://localhost:3000/angular2/http.js 404 (Not Found)

我查找了教程，它们以相同的方式包含angular2 / http。 有谁看到出了什么问题？

Answer 1

您需要检查是否在主HTML文件中包含http.dev.js文件：

<script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<script src="node_modules/rxjs/bundles/Rx.js"></script>
<script src="node_modules/angular2/bundles/angular2.dev.js"></script>
<script src="node_modules/angular2/bundles/router.dev.js"></script>
<script src="node_modules/angular2/bundles/http.dev.js"></script>

然后，您需要添加HTTP_PROVIDERS作为引导函数的第二个参数：

import { HTTP_PROVIDERS } from 'angular2/http';

bootstrap(MyMainComponent, [ HTTP_PROVIDERS ]);

希望它对你有帮助，蒂埃里