我已经在CustomHttp 中读取了Access EventEmitter Service等问题,其中用户在其服务中使用了EventEmitter,但是他在本评论中建议他 不要使用它,而是直接在他的服务中使用Observables.

我还阅读了这个 问题 ,解决方案建议将EventEmitter传递给子节点并订阅它.

我的问题是:我应该,还是不应该手动订阅EventEmitter？我该怎么用？

我试图从一个文件导入组件另一个根组件文件.它给出了错误..

zone.js:484未处理的Promise拒绝:模板解析错误:'courses'不是已知元素:1.如果'courses'是Angular组件,则验证它是否是此模块的一部分.2.如果"courses"是Web组件,则将"CUSTOM_ELEMENTS_SCHEMA"添加到此组件的"@NgModule.schema"以禁止显示此消息.("

我的第一个Angular 2 App

[错误 - >]"):AppComponent @ 0:31;区域:;任务:Promise.then;值:错误:模板解析错误:(...)错误:模板解析错误:'courses'不是已知元素:

我的app.component.ts就像[根组件文件]

import { Component } from '@angular/core';
import {CoursesComponent} from './courses.component';

@Component({
  selector: 'my-app',
  template: '<h1>My First Angular 2 App</h1><courses></courses>',
  directives:[CoursesComponent],
})

export class AppComponent { }

和我的courses.component.ts是;

import { Component } from '@angular/core';
@Component({
  selector: 'courses',
  template: '<h1>courses</h1>'
})
export class CoursesComponent { }

从app.component中的courses.component.ts文件导入课程组件时,我无法在其中声明指令 @Component{}

directives:[CoursesComponent] 给我错误

请告知解决方案.

我是Angular 2的初学者,我正在使用最终的Angular 2发行版.我有一个奇怪的问题.这是我的databinding.component.ts代码:

import { Component } from '@angular/core';

import {PropertyBindingComponent} from './property-binding.component';
import {EventBindingComponent} from './event-binding.component';


@Component({
  selector: 'fa-databinding',
  templateUrl: 'databinding.component.html',
  styleUrls: ['databinding.component.css'],
  directives: [PropertyBindingComponent, EventBindingComponent]
})

这是我的app.module.ts代码的和平:

import { PropertyBindingComponent } from './databinding/property-binding.component';
import { EventBindingComponent } from './databinding/event-binding.component';

@NgModule({
  declarations: [
    AppComponent,
    OtherComponent,
    AnotherComponent,
    DatabindingComponent,
    PropertyBindingComponent,
    EventBindingComponent
  ]

此代码无法正常工作:

ERROR in [default] /home/tornado/work/first-app/src/app/databinding/databinding.component.ts:11:2 
Argument of type '{ selector: string; template: any; styles: any[]; directives: (typeof PropertyBindingComponent | ...' is not assignable to parameter …

I'm currently working on adding a CodeMirror editor to a project, an Angular2 project more precisely. But Im' having trouble doing it. The instantiation of my editor doesn't seem to work correctly. My code is the following:

editor.component.ts

import {Component} from 'angular2/core'
import {BrowserDomAdapter} from 'angular2/platform/browser'

declare var CodeMirror: any;

@Component({
    selector: 'editor',
    templateUrl: './meang2app/partials/editor.html'
})

export class Editor{
    dom: BrowserDomAdapter;
    editor: any;
    constructor(){
        this.dom = new BrowserDomAdapter();
        this.editor = new CodeMirror.fromTextArea(this.dom.query("textarea"), {lineNumbers: true, mode: {name: "javascript", globalVars: true}});
    } …