Firebase Auth邮箱密码登录报错：TypeError: auth._getRecaptchaConfig is not a function

错误根源 #

调用signInWithEmailAndPassword时参数顺序错误，该方法第一个参数必须是getAuth()返回的Auth实例，你直接传入邮箱和密码，导致Firebase内部调用依赖方法时抛出错误。

修正后的代码 #

import { initializeApp } from "firebase/app";
import { getAuth, signInWithEmailAndPassword } from "firebase/auth";

const firebaseConfig = {
  apiKey: "XXXXXXXXXXXXXX",
  authDomain: "XXXXXXXXXXXXXXXXXX",
  projectId: "XXXXXXXXXXXXXXXXXX",
  storageBucket: "XXXXXXXXXXXX",
  messagingSenderId: "XXXXXXXXXXX",
  appId: "XXXXXXXXX",
};

const app = initializeApp(firebaseConfig);

export default async function handler(req, res) {
  if (req.method === "GET") {
    return res.send("Working");
  } else if (req.method === "POST") {
    const email = req.body.email;
    const password = req.body.password;
    const auth = getAuth();
    // 修正参数顺序：先传入Auth实例，再传邮箱和密码
    signInWithEmailAndPassword(auth, email, password)
      .then((userCredential) => {
        // signInWithEmailAndPassword返回的是UserCredential对象，用户信息需从user属性获取
        const user = userCredential.user;
        return res.status(200).json({ user });
      })
      .catch((e) => {
        return res.status(500).json({ e: e.message || `${e}` });
      });
  }
}

额外提示 #

• 务必严格遵循Firebase Auth方法的参数定义，避免参数顺序错误
• 捕获错误时优先返回e.message，能得到更精准的错误描述
• 注意signInWithEmailAndPassword的返回值结构，不要直接将返回结果当作用户对象处理

内容的提问来源于stack exchange，提问作者user20816962