已成功找到 `Firebase` 包。然而，这个包本身指定了一个无法解析的`main`模块字段

Question

我正在尝试读取和写入 firestore，使用 firebase 的身份验证，以及在 expo 管理的 react-native 应用程序中使用 firebase 的存储。

完整错误：

While trying to resolve module `firebase` from file `C:\Users\joshu\Desktop\VSProjects\VolleyballConnect\firebase.js`, the package `C:\Users\joshu\Desktop\VSProjects\VolleyballConnect\node_modules\firebase\package.json` was successfully found. However, this package itself specifies a `main` module field that could not be resolved (`C:\Users\joshu\Desktop\VSProjects\VolleyballConnect\node_modules\firebase\index`. Indeed, none of these files exist:

  * C:\Users\joshu\Desktop\VSProjects\VolleyballConnect\node_modules\firebase\index(.native|.android.ts|.native.ts|.ts|.android.tsx|.native.tsx|.tsx|.android.js|.native.js|.js|.android.jsx|.native.jsx|.jsx|.android.json|.native.json|.json)
  * C:\Users\joshu\Desktop\VSProjects\VolleyballConnect\node_modules\firebase\index\index(.native|.android.ts|.native.ts|.ts|.android.tsx|.native.tsx|.tsx|.android.js|.native.js|.js|.android.jsx|.native.jsx|.jsx|.android.json|.native.json|.json)

我的 firebase 配置文件：

import firebase from "firebase";
import { initializeApp } from "firebase/app";
import "firebase/firestore";
import "firebase/auth";
import "firebase/storage";

// I'm using the example key here, I have the correct config
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: "sender-id",
  appId: "app-id",
  measurementId: "G-measurement-id",
};

if (firebase.apps.length === 0) {
  initializeApp(firebaseConfig);
}

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

export { db, auth, storage };

我安装了 firebase 软件包：

expo install firebase

如有任何帮助，我们将不胜感激。谢谢！

Answer 1

为了减小应用程序的大小，firebase SDK (v9.0.0) 变成了模块化。您不能再像以前那样在 v8 上执行导入语句。

你有两个选择。

使用向后兼容的方式。（稍后将被删除）：

这个：

import firebase from 'firebase/app';
import 'firebase/auth';
import 'firebase/firestore';

应改为：

// v9 compat packages are API compatible with v8 code
import firebase from 'firebase/compat/app';
import 'firebase/compat/auth';
import 'firebase/compat/firestore';

现在重构你的代码。

来自这里：

import firebase from "firebase/compat/app";
import "firebase/compat/auth";

const auth = firebase.auth();
auth.onAuthStateChanged(user => { 
  // Check for user status
});

为此：

import { getAuth, onAuthStateChanged } from "firebase/auth";

const auth = getAuth(firebaseApp);
onAuthStateChanged(auth, user => {
  // Check for user status
});

你绝对应该检查 documentation

Answer 2

我今天遇到了同样的问题，就我而言，已通过以下方式解决。

1.

// v9 compat packages are API compatible with v8 code
import firebase from 'firebase/compat/app';
import 'firebase/compat/auth';
import 'firebase/compat/firestore';

变化自↓

if (firebase.apps.length === 0) {
  initializeApp(firebaseConfig);
}

到↓

app = firebase.initializeApp(firebaseConfig)

This link was really helpfull

为了安全起见，我分享我的firebase.js（隐藏个人信息）

import firebase from 'firebase/compat/app';
import 'firebase/compat/auth';
import 'firebase/compat/firestore';

const firebaseConfig = {
  apiKey: "AIzxxxxxxxxxxxxxxxxxxxBbBFNGMI",
  authDomain: "sixxxxxxxxxcc8.firebaseapp.com",
  projectId: "sxxxxxxxxxxx8",
  storageBucket: "xxxxxxxxxxxxxcc8.appspot.com",
  messagingSenderId: "6xxxxxxxxxx",
  appId: "1:65xxxxxxxx13:web:d0exxxxxxxxxxxxxxxxx7c"
};

let app;

if (firebase.apps.length === 0) {
  app = firebase.initializeApp(firebaseConfig)
} else {
  app = firebase.app();
}

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

export { db, auth };

Answer 3

卸载firebase，然后安装firebase@8.2.3

Answer 4

尝试在 firebase.js 文件

中使用此导入语句

import  firebase  from 'firebase/compat';

已成功找到 `Firebase` 包。然而，这个包本身指定了一个无法解析的`main`模块字段

`Firebase` package was successfully found. However, this package itself specifies a `main` module field that could not be resolved

javascript

node.js

firebase

react-native

expo