react-native-twitter-lite: Error: Unable to resolve module 'crypto' - react-native

Question

I have followed the instructions to install react-native-twitter-lite via npm page ....as per below:
npm install twitter-lite
....then on app.js:
import Twitter from 'twitter-lite';
const twtClient = new Twitter({
consumer_key: 'xxxx',
consumer_secret: 'xxxx',
});
...I get error Unable to resolve module crypto from node_modules\twitter-lite\dist\twitter.js: crypto could not be found within the project
...even though I can see that the file node_modules\twitter-lite\dist\twitter.js exists

Answer 1

The issue might be that cryptojs is missing from your dependencies (not installed in your app), but react-native-twitter-lite still need it to run for security. You surely have the twitter.js but not the crypto.js. Cryptojs is used by twitter-lite to cypher and encrypt data. You may choose to use Nodejs's crypto module or react-native's build-in cryptojs. I always choose the later one for a more native behavior. For that, simple run
npm install react-native-crypto-js --save.
The first time I run into this issue this source helped me understand.

Answer 2

This happens to me, most likely when installing a new package to my project, I didn't try to install react-native-twitter-lite , but my general approach is :
Try to install the missing module yourself , in your case, install Crypto
Delete node_modules and install the dependencies again, run rm -rf node_modules && npm install
run your project npm start and then npm run android && npm run ios

Answer 3

If you install native module you will need to rebuild your app. It’s jut hot reloadable.
If that’s not your issue, but you’re using typescript, you may be missing a dependency that can fortunately be resolved using:
npx typesync
Are you using Expo or Xcode/Android Studio? If Expo, note that Expo handles a Bare and a Managed workflow. If you are using a managed workflow you may have these issues since Expo is managing native modules for you so you may want to check if Expo has a similar dependency to what you’re using, otherwise you may want to eject from Expo.
If developing for iOS, you may also want to check if you’ve installed the pods you need. You can do this using the following:
npx pod-install from root of project directory (likely same directory as package.json)
All else fails:
rn -rf node_modules
npm install && npx pod-install
(If usingTypescript also try npx typesync)
If developing for Android, make sure you add necessary code on gradle file, can be pasted anywhere (likely in docs)