问题：Firebase：没有创建 Firebase App '[DEFAULT]' - 调用 Firebase App.initializeApp() (app-compat/no-app)

Question

我正在练习制作一些使用 ReactJS 的项目，但是当我如下保存配置文件时，它显示错误作为标题。有没有人遇到过这个问题？请帮我！ 谢谢！

import { initializeApp } from "firebase/app";
import { getAnalytics } from "firebase/analytics";
import firebase from 'firebase/compat/app';
import 'firebase/analytics';
import 'firebase/compat/auth';
import 'firebase/compat/firestore';

// TODO: Add SDKs for Firebase products that you want to use
// https://firebase.google.com/docs/web/setup#available-libraries

// Your web app's Firebase configuration
// For Firebase JS SDK v7.20.0 and later, measurementId is optional
const firebaseConfig = {
  apiKey: "AIzaSyD0rxJTIV4RIKfdFJB6G--9md2-SAEDwjs",
  authDomain: "chat-app-d3f09.firebaseapp.com",
  projectId: "chat-app-d3f09",
  storageBucket: "chat-app-d3f09.appspot.com",
  messagingSenderId: "361125159681",
  appId: "1:361125159681:web:9557ff40c4e38e30ba3100",
  measurementId: "G-X1Q63CL2N2"
};

// Initialize Firebase
const app = initializeApp(firebaseConfig);
const analytics = getAnalytics(app);

const auth = firebase.auth();
const db = firebase.firestore();

export { db, auth }
export default firebase

Answer 1

您正在使用带有 8 & > 的 firebase 版本 9。

试试：

const app = initializeApp(firebaseConfig);
const analytics = getAnalytics(app);

//const auth = firebase.auth();
const auth = getAuth(app)
//const db = firebase.firestore();
const db = getFirestore(app)

或者如果你想使用版本 8 & > 那么：

const app = firebase.initializeApp(firebaseConfig);
//const analytics = getAnalytics(app);

const auth = firebase.auth();
const db = firebase.firestore();

请注意，firebase 版本 9+ 是以功能方式编写的。