src/app/her.service.ts中的错误(2，22)：ERROR TS2305:模块TS2305没有导出成员“of”

Question

下面是我的角度package.json设置

"dependencies": {
  "@angular/animations": "^5.2.11",
  "@angular/common": "^5.2.11",
  "@angular/compiler": "^5.2.11",
  "@angular/core": "^5.2.11",
  "@angular/forms": "^5.2.11",
  "@angular/http": "^5.2.11",
  "@angular/platform-browser": "^5.2.11",
  "@angular/platform-browser-dynamic": "^5.2.11",
  "@angular/router": "^5.2.11",
  "core-js": "^2.4.1",
  "rxjs": "^5.5.10",
  "zone.js": "^0.8.19"
},

"devDependencies": {
    "@angular/cli": "~1.7.4",
    "@angular/compiler-cli": "^5.2.11",
    "@angular/language-service": "^5.2.11"
}

下面是HeroService组件的代码，并得到下面发布的错误。

import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import 'rxjs/add/Observable/of';
import { Hero } from './hero';
import { HEROES } from './mock-heroes';

@Injectable()
export class HeroService {
  constructor() { }
  getHeroes() : Observable<Hero[]> {
      return of(HEROES);
  }

}

错误：

ERROR in src/app/hero.service.ts(2,22): error TS2305: Module '"F:/practice/Angular/cli/angular-tour-of-heroes/node_modules/rxjs/Rx"' has no exported member 'of'.

以下是我尝试过但没有取得积极结果的几样东西：

import { Observable, of } from 'rxjs';

和

import { Observable, of } from 'rxjs/Observable';

对此有什么建议吗？

Answer 1

我认为导入路径是不正确的。

试着进口如下所示：

import 'rxjs/add/observable/of';

或

import { of } from 'rxjs/observable/of';

Answer 2

从正确的地方进口：

import 'rxjs/add/observable/of';