React Native issue: Module does not exist in the Haste module map

Question

I created a native module and created another project to test it locally.

Here are my steps: cd <Testing project> npm install ../<Module project> react-native link <module name> react-native run-android

Then I got following error:

 error: bundling failed: Error: Unable to resolve module `react-native-helloworld` from `G:\Test\App.js`: Module `react-native-helloworld` does not exist in the Haste module map

    This might be related to https://github.com/facebook/react-native/issues/4968
    To resolve try the following:
      1. Clear watchman watches: `watchman watch-del-all`.
      2. Delete the `node_modules` folder: `rm -rf node_modules && npm install`.
      3. Reset Metro Bundler cache: `rm -rf /tmp/metro-bundler-cache-*` or `npm start -- --reset-cache`.
      4. Remove haste cache: `rm -rf /tmp/haste-map-react-native-packager-*`.

I've searched StackOverflow for the issue, but there's no workable solution. The suggested solution 'clear the cache and reset everything' cannot work.

However, the module can work if I publish it to https://www.npmjs.com/ and then install it via npm install <module name>.

The only difference is the installing way.

Answer 1

I got a similar error complaining about how it could not find 'path' from where ever it was looking for. In the end I figured out that the issue was completely unrelated.The following auto import was accidentally added to my code (probably when I was creating a style using 'textTransform')

import { transform } from "@babel/core";

Once I noticed that and removed it, the project was buildable. It might help to check recent changes in your code to see if something similar got added.