node Error: Cannot find module 'react-native-activity-view'

[ataillefer]

I've installed react-native-activity-view in my project with npm i --save react-native-activity-view then when trying to resolve the module with node I get:

~/sources/nuxeo-mobile$ node -e "require.resolve('react-native-activity-view')"
module.js:442
    throw err;
    ^
Error: Cannot find module 'react-native-activity-view'
    at Function.Module._resolveFilename (module.js:440:15)
    at Function.resolve (internal/module.js:27:19)
    at [eval]:1:9
    at Object.exports.runInThisContext (vm.js:54:17)
    at Object.<anonymous> ([eval]-wrapper:6:22)
    at Module._compile (module.js:541:32)
    at node.js:311:29
    at _combinedTickCallback (internal/process/next_tick.js:67:7)
    at process._tickCallback (internal/process/next_tick.js:98:9)

I actually first noticed this using eslint, but in fact the issue occurs at the node level:

~/sources/nuxeo-mobile$ npm run lint

> nuxeo-mobile@1.1.0 lint /Users/ataillefer/sources/nuxeo-mobile
> node node_modules/eslint/bin/eslint.js src/

/Users/ataillefer/sources/nuxeo-mobile/src/Root.js
  4:26  error  Unable to resolve path to module 'react-native-activity-view'  import/no-unresolved

with import ActivityView from 'react-native-activity-view'; at the top of Root.js.

This happens because node uses the "main" element of package.json: ActivityView to try to find the react-native-activity-view/ActivityView file which doesn't exist.

Usually "main" references an index.js file, that might be a solution if you can manage the iOS vs unsupported Android issue.

Setting "main": "ActivityView.ios.js" in package.json is a temporary workaround.

On our side we used the following workaround in .eslintrc:

'rules': {
  ...
  'import/no-unresolved': [2, { ignore: ['react-native-activity-view'] }],
},

Thanks!

[fantattitude]

It also breaks with flow.
If you use the provided module name ActivityView, flow won't complain but you'll experience a runtime error Module not found.
If you use the package name react-native-activity-view, flow will complain it can't find the module but at runtime everything will be fine…