react-native > firebase > While trying to resolve module `idb`

Firebase9.8.3を入れたところ、
While trying to resolve module idb というエラーメッセージが表示される。

While trying to resolve module `idb` from file `/Users/xxxx/Github/Private/react-native-auth-google/node_modules/@firebase/app/dist/esm/index.esm2017.js`, the package `/Users/xxxx/Github/Private/react-native-auth-google/node_modules/idb/package.json` was successfully found. However, this package itself specifies a `main` module field that could not be resolved (`/Users/xxxx/Github/Private/react-native-auth-google/node_modules/idb/build/index.cjs`. Indeed, none of these files exist:

解決方法

metro.config.jsをルートに追加する

metro.config.js

const { getDefaultConfig } = require('@expo/metro-config');

const defaultConfig = getDefaultConfig(__dirname);

defaultConfig.resolver.assetExts.push('cjs');

module.exports = defaultConfig;

参考