Question

Firebase 身份验证 ReferenceError：找不到变量：auth

2022-08-03

355

javascript firebase react-native firebase-authentication

ReferenceError：找不到变量：auth

请帮忙

const handleLogin = () => {
    auth
      .signInWithEmailAndPassword(email, password)
      .then(userCredentials => {
        const user = userCredentials.user;
        console.log('Logged in with:', user.email);
      })
      .catch(error => alert(error.message))
  }

Answer 1

从

npm install @react-native-firebase/auth 安装 @react-native-firebase/auth

并导入

从 '@react-native-firebase/auth' 导入 auth

Answer 2

安装 firebase/auth 包并在使用它的组件中导入 auth 包有关详细信息，请参阅此链接 https://rnfirebase.io/auth/usage

它应该是这样的
auth().signInWithEmailAndPassword(email, password)

Answer 3

您期望 auth 来自何处？

如果您遵循 Firebase 文档，入门页面会将 auth 变量初始化为：

// Initialize Firebase Authentication and get a reference to the service
const auth = firebase.auth();