Angular 2异常:TypeError:无法读取未定义的属性"注释"

Question

我究竟做错了什么？

app.component.ts

import {Component} from 'angular2/core';
@Component({
  selector: 'my-app',
  template: `{{title}}`
})
export class App {
  title = "Angular 2 beta";
  constructor() { console.clear(); }
}

main.ts

import {bootstrap} from 'angular2/platform/browser';
import {AppComponent} from './app.component';

bootstrap(AppComponent);

错误是

EXCEPTION: TypeError: Cannot read property 'annotations' of undefined

Answer 1

类名与引导时不匹配.即,而不是

export class App { ... }

使用

export class AppComponent { ... }

Angular试图找到annotations一个名为的类的属性AppComponent,但该类不存在,因此错误.