main.js:65 Uncaught TypeError: firebase.database is not a function · Issue #396 · firebase/codelab-friendlychat-web · GitHub
![javascript - "TypeError: db._checkNotDeleted is not a function" When creating a Storage Ref on Firebase / React - Stack Overflow javascript - "TypeError: db._checkNotDeleted is not a function" When creating a Storage Ref on Firebase / React - Stack Overflow](https://i.stack.imgur.com/pVk67.png)
javascript - "TypeError: db._checkNotDeleted is not a function" When creating a Storage Ref on Firebase / React - Stack Overflow
![🔥 this._database.native.on is not a function · Issue #3379 · invertase/ react-native-firebase · GitHub 🔥 this._database.native.on is not a function · Issue #3379 · invertase/ react-native-firebase · GitHub](https://user-images.githubusercontent.com/10357801/78075062-bb6f9a80-739b-11ea-9843-f4d65ea9e0c7.png)
🔥 this._database.native.on is not a function · Issue #3379 · invertase/ react-native-firebase · GitHub
firebase.database() is not a function in v9 firebase · Issue #1134 · prescottprue/react-redux-firebase · GitHub
![javascript - TypeError: _app2.default.database is not a function. (In '_app2.default.database()', '_app2.default.database' is undefined) - Stack Overflow javascript - TypeError: _app2.default.database is not a function. (In '_app2.default.database()', '_app2.default.database' is undefined) - Stack Overflow](https://i.stack.imgur.com/em2Ar.png)