Angular 7-获取错误:'RXJS没有导出成员'Observable'

Question

"dependencies": {
    "@angular/animations": "~7.1.0",
    "@angular/common": "~7.1.0",
    "@angular/compiler": "~7.1.0",
    "@angular/core": "~7.1.0",
    "@angular/forms": "~7.1.0",
    "@angular/material": "^7.1.1",
    "@angular/platform-browser": "~7.1.0",
    "@angular/platform-browser-dynamic": "~7.1.0",
    "@angular/router": "~7.1.0",
    "core-js": "^2.5.4",
    "ng2-opd-popup": "^1.1.21",
    "rxjs": "~6.3.3",
    "tslib": "^1.9.0",
    "zone.js": "~0.8.26"

import { Injectable } from '@angular/core';
import { Http, Headers} from '@angular/http';
import 'rxjs/add/operator/map';
//import { Observable } from 'rxjs/Observable';
//import   'rxjs/add/observable';
import { Observable} from 'rxjs';
@Injectable({
  providedIn: 'root'
})
export class EmpService {
  employees=[];
  constructor(private _http: Http) { }
  addEmployee(info){
    return this._http.post("http://localhost/data/insert.php",info)
      .map(()=>"");
  }
}

rxjs没有导出的成员'Observable'

版本中有什么问题吗？

Answer 1

为了与rxjs6和angular 7兼容，您必须替换：

import { Http, Headers } from '@angular/http';
import 'rxjs/add/operator/map';

由：

import { map } from 'rxjs/operators';
import { HttpClient, HttpHeaders } from '@angular/common/http';

并像这样导入Observable：

import { Observable } from 'rxjs';

import { Observable } from 'rxjs/Observable';
// or import   'rxjs/add/observable';