从' firebase‘导入* as firebase从Angular 6更新不再有效

npm install firebase @angular/fire --save

import { Component } from '@angular/core';
import { AngularFireAuth } from '@angular/fire/auth';
import { AngularFireDatabase } from '@angular/fire/database';

@Component({
  selector: 'app-root',
  template: `
    <button (click)="login()">Login</button>
    <button (click)="logout()">Logout</button>
  `,
})
export class AppComponent {
  constructor(private afAuth: AngularFireAuth, private db: AngularFireDatabase) {}

  login() {
    this.afAuth.signInWithEmailAndPassword('email@example.com', 'password')
      .then(userCredential => {
        // 登录成功后的操作
      })
      .catch(error => {
        // 处理登录错误
      });
  }

  logout() {
    this.afAuth.signOut()
      .then(() => {
        // 登出成功后的操作
      })
      .catch(error => {
        // 处理登出错误
      });
  }
}