Error: Unable to resolve module, could not be found within the project

Question

I have been trying to include a React native library (Local Library) to the React Native app.

So I installed it using

npm install library-path

Then I run

npm link libraryname

I can see the package in the node_modules of the mainProject. Also, in package.json, I can see the dependencies:

"dependencies": {
    "react": "16.13.1",
    "react-native": "0.63.2",
    "react-native-first-library": "file:../react-native-first-library",
    "react-native-toast-message": "^1.3.3",
    "react-native-webview": "^10.8.3"
  },

react-native-first-library is my react module.

I have done

Clear watchman watches: watchman watch-del-all

Delete node_modules: rm -rf node_modules and run yarn install

Reset Metro's cache: yarn start --reset-cache

Remove the cache: rm -rf /tmp/metro-*

But still, it is not working. I don't know why these things are so complex.

If you remove this given library that works? Can you provide more info on that one? Also, make sure you removed yarn.lock file or package-lock.json before reinstalling node_modules. — David Thery
I just copy-pasted the "created Local Library" into the "node_modules" and it worked. I figured out after a long time. Thanks David. However, there is another problem, if you can help, I want to create a react native library which will have a webview and certain parameters must be passed from the react native app, like url and some other data and give the callbacks back to the project. If you know a way to do this. Please let me know. Till now i have made a component and render it in the app. — Aman Verma
This post might answer it (however I'm not sure this is the good place to broach another topic): stackoverflow.com/questions/62902660/… — David Thery

DimKa DimKa · Accepted Answer · 2020-09-09T13:26:25

I had to integrate a custom library once. I just created a folder at root level customLibs and I put the folder of my library into. Then in the package.json I specified "myLib": "file:./customLibs/myLib"

I'm not sure but in your package.json the path should not be file:../react-native-first-library with two dots but surely with one dot.

And at the end just yarn or npm i

Error: Unable to resolve module, could not be found within the project

2 Answers