React Native Peer Dependency issue in Expo

Question

What is the best way to deal with solving a peer dependency issue in React Native when using Expo? I am stuck with a peer dependency error. I didn’t install any new packages to cause a new peer dependency, what happened is I got a node modules error (as does happen in RN sometimes) and I had to blow away and reinstall all my node modules.

I think that something got out of sync when this I re-instantiated my node modules. Any ideas on how to get around it? I have tried making my package.json specifically versioned but I haven’t found the right setup. FWIT Expo is throwing me this warning:

“Warning: ‘firebase’ peer depencency missing”

When I run

npm install OR npm ls

I get the following messages:

FWIT: my package.json looks like this

{
  "name": "RN-expo",
  "version": "0.0.0",
  "description": "Hello Expo!",
  "author": null,
  "private": true,
  "main": "main.js",
  "dependencies": {
    "expo": "17.0.0",
    "firebase": "4.1.2",
    "geofire": "^4.1.2",
    "lodash": "^4.17.4",
    "moment": "^2.18.1",
    "react": "16.0.0-alpha.6",
    "react-native": "https://github.com/expo/react-native/archive/sdk-17.0.0.tar.gz",
    "react-native-gifted-chat": "^0.1.4",
    "react-native-modal-dropdown": "^0.4.4",
    "react-native-multislider": "0.0.14",
    "react-native-vector-icons": "^4.2.0",
    "react-navigation": "git+https://github.com/react-community/react-navigation.git"
  },
  "devDependencies": {
    "standard": "^10.0.2"
  }
}

These errors are not occurring on anyone else's computers on my team, so I think it has something to do with the node dependencies on my computer. I have completely uninstalled all node / npm related material on my computer and attempted to reinstall it to see if it solved the issue.

While scrolling through the npm ls I see the the "UNMET PEER DEPENDENCIES" are:

UNMET PEER DEPENDENCY [email protected]
UNMET PEER DEPENDENCY react@>=15.3.1

Any suggestions on how to go about solving this?

ide ide · Accepted Answer · 2017-06-30T03:20:52

From what I can see in your package.json, I'd expect your teammates also to encounter the same warnings.

The warning between geofire and firebase is because you're using [email protected] but geofire wants firebase 3.x. Often (but also often not) libraries like geofire will work with newer versions of their peer dependencies, so I recommend asking the authors of geofire if it'd work with [email protected].

The other warnings between React Native packages and React are spurious. For example, react-native-maps says it accepts react >= 15.4.0 and you're using [email protected], which is clearly greater than 15.4.0. This has been addressed by Yarn, which detects that [email protected] satisfies the requirement of react >= 15.4.0.

All this is to say that I'd expect you to see the warnings that you're seeing, and that the firebase one is legitimate and you can ignore the react one.

React Native Peer Dependency issue in Expo

1 Answers