小编Hak*_*ara的帖子

我正在学习Firebase使用身份验证NextJS，尝试理解使用多个源（文章/youtube），但我遇到了这个错误

ReferenceError: Cannot access 'auth' before initialization

老实说我仍在尝试寻找the source但仍然卡住了

这是我的firebase.js

import { firebase, initializeApp } from "firebase/app";
import { getAnalytics } from "firebase/analytics";
const firebaseConfig = {
  apiKey: process.env.APIKEY,
  authDomain: process.env.AUTH,
  projectId: process.env.PID,
  storageBucket: process.env.BUCKET,
  messagingSenderId: process.env.MSID,
  appId: process.env.AID,
  measurementId: process.env.MID,
};
const app = !firebase.apps.length
  ? initializeApp(firebaseConfig)
  : firebase.app();
const analytics = getAnalytics(app);
const auth = app.auth();
const db = app.firestore();
const googleProvider = new firebase.auth.GoogleAuthProvider();

export {
  auth,
  db,
  signInWithGoogle,
  ... …