1. 检查 firebase 包是否已升级到最新版本

2. 确保正确导入所需的 Firebase 模块 import { AngularFireModule } from '@angular/fire'; import { AngularFirestoreModule } from '@angular/fire/firestore'; import { AngularFireAuthModule } from '@angular/fire/auth';

3. 将 Firebase 的初始化代码放在 app.module.ts 中，并避免在 app.component.ts 中进行

4. 确保配置中的 Firebase 凭据是正确的

5. 确保在应用程序中正确实例化 AngularFireAuth 和 AngularFirestore

示例： app.module.ts

import { NgModule } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { AngularFireModule } from '@angular/fire'; import { AngularFirestoreModule } from '@angular/fire/firestore'; import { AngularFireAuthModule } from '@angular/fire/auth';

import { AppComponent } from './app.component';

const firebaseConfig = { apiKey: 'API-KEY', authDomain: 'PROJECT-ID.firebaseapp.com', databaseURL: 'https://PROJECT-ID.firebaseio.com', projectId: 'PROJECT-ID', storageBucket: 'PROJECT-ID.appspot.com', messagingSenderId: 'ID' };

@NgModule({ declarations: [AppComponent], imports: [ BrowserModule, AngularFireModule.initializeApp(firebaseConfig), AngularFirestoreModule, AngularFireAuthModule ], providers: [], bootstrap: [AppComponent] }) export class AppModule {}

app.component.ts

import { Component } from '@angular/core'; import { AngularFireAuth } from '@angular/fire/auth'; import { AngularFirestore } from '@angular/fire/firestore';

@Component({ selector: 'app-root', template: '' }) export class AppComponent { constructor( private firestore: AngularFirestore, private auth: AngularFireAuth ) {} }