I am getting "Unable to resolve module `react - react-native

i am getting the below error.
The development server returned response error code: 500
URL: http://10.0.2.2:8081/index.android.bundle?platform=android&dev=true&hot=false&minify=false
Body:
{"from":"D:\AwesomeProject\index.android.js","to":"react","message":"Unable to resolve module react from D:\\AwesomeProject\\index.android.js: Module does not exist in the module map or in these directories:\n D:\AwesomeProject\node_modules\n\nThis might be related to https://github.com/facebook/react-native/issues/4968\nTo resolve try the following:\n 1. Clear watchman watches: watchman watch-del-all.\n 2. Delete the node_modules folder: rm -rf node_modules && npm install.\n 3. Reset packager cache: rm -fr $TMPDIR/react-* or npm start --reset-cache.","name":"UnableToResolveError","type":"UnableToResolveError","errors":[{}]}
onResponse
DevServerHelper.java:332
execute
RealCall.java:126
run
NamedRunnable.java:32
runWorker
ThreadPoolExecutor.java:1112
run
ThreadPoolExecutor.java:587
run
Thread.java:818
{"from":":\\AwesomeProject\\index.android.js","to":"react","message":"Unable to resolve module `react`
i tried every workaround given by the log still it's not working..

Check whether the folder named react exists inside node_modules named folder or not, and if it is not there then,
stop the server and again install 'react'
npm install react --save
after the installation please restart the sever by reseting the cache
npm start --reset-cache
Then run your application

Try
npm install
hopefully this resolve

There is a problem with the node module i had to remove the node module and add then i had to downgrade the the React-Native Library and Run the command react-native start and then react-native run-android after that it worked for me.

Related

React-Native - Unable to resolve module fs from node_modules/eslint/lib/cli-engine/cli-engine.js

I have this react-native app that worked just fine, but suddenly I get this error:
error: bundling failed: Error: Unable to resolve module `fs` from `node_modules/eslint/lib/cli-engine/cli-engine.js`: fs could not be found within the project.
The first time that I got it, I was just testing the app, doing things I have been doing all day, nothing new, nothing unusual. Now I can't even start the app on my device.
I start the app with this script: yarn start-fresh from my package.json:
"start-fresh": "cd android/ && ./gradlew clean && cd .. && rm -rf node_modules/ && yarn install && react-native start --reset-cache"
Then in a new terminal tab, I do yarn android. It loads everything fine in this 2nd tab, but then when I go back to the first tab(where I ran yarn start-fresh), it loads some stuff but then I get the error. I don't remember installing any new package or update the packages or anything like that...
I tried searching online for solutions but I couldn't find anything helpful. Also, after the error I have this list:
If you are sure the module exists, try these steps:
1. Clear watchman watches: watchman watch-del-all
2. Delete node_modules: rm -rf node_modules and run yarn install
3. Reset Metro's cache: yarn start --reset-cache
4. Remove the cache: rm -rf /tmp/metro-*
I tried everything that is listed there, but none worked.
Could anyone help me make this app work again?
Well, are you using VSCode?
I think there is auto imported module in your code while you're coding. In the vscode, if you type something, then it suggests auto-import and maybe you import unused modules.
Please check the codes that you have unused modules.

Module `#react-navigation/core` does not exist in the Haste module map

i've have a weird one with a react native project running both react-navigation and redux.
i need to add this package:
https://github.com/react-navigation/react-navigation-redux-helpers
i ran:
npm install react-navigation-redux-helpers
then added this line to my code:
import { createNavigationReducer } from 'react-navigation-redux-helpers';
now whenever i run the project, it fails to compile with this error:
Module `#react-navigation/core` does not exist in the Haste module map
Anyone ran into something like this before?
I've tried removing node_modules folder and package.lock file. then I tried clearing Watchman and NPM cache
Remove the node_modules folder and react-navigation-redux-helpers from package.json.
Go to the root directory of the project and remove the current node modules and install again.
rm -rf node_modules npm install

Unable to resolve module `#babel/runtime/helpers/interopRequireDefault`

When creating a new react native project using the standard react-native init MyApp and running react-native run-ios for the first time I'm seeing the following error
error: bundling failed: Error: Unable to resolve module `#babel/runtime/helpers/interopRequireDefault` from `/Users/chrisedgington/Development/ReactNative/SixNationsPredictor/index.js`: Module `#babel/runtime/helpers/interopRequireDefault` 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-*`.
at ModuleResolver.resolveDependency (/Users/chrisedgington/Development/ReactNative/MyApp/node_modules/metro/src/node-haste/DependencyGraph/ModuleResolution.js:209:1301)
at ResolutionRequest.resolveDependency (/Users/chrisedgington/Development/ReactNative/MyApp/node_modules/metro/src/node-haste/DependencyGraph/ResolutionRequest.js:83:16)
at DependencyGraph.resolveDependency (/Users/chrisedgington/Development/ReactNative/MyApp/node_modules/metro/src/node-haste/DependencyGraph.js:238:485)
at Object.resolve (/Users/chrisedgington/Development/ReactNative/MyApp/node_modules/metro/src/lib/transformHelpers.js:180:25)
at dependencies.map.result (/Users/chrisedgington/Development/ReactNative/MyApp/node_modules/metro/src/DeltaBundler/traverseDependencies.js:311:29)
at Array.map (<anonymous>)
at resolveDependencies (/Users/chrisedgington/Development/ReactNative/MyApp/node_modules/metro/src/DeltaBundler/traverseDependencies.js:307:16)
at /Users/chrisedgington/Development/ReactNative/MyApp/node_modules/metro/src/DeltaBundler/traverseDependencies.js:164:33
at Generator.next (<anonymous>)
at step (/Users/chrisedgington/Development/ReactNative/MyApp/node_modules/metro/src/DeltaBundler/traverseDependencies.js:266:307)
I've tried running the suggested but still see the same issue. I've seen a few posts about similar issues but nothing specifically seems to say how to resolve the problem in react-native.
macOS: 10.13.6
node: 8.11.3
react-native-cli: 2.0.1
react-native: 0.57.1
Have a go and try:
npm add #babel/runtime
Or upgrade babel runtime:
"#babel/runtime": "7.0.0-beta.55"
I tried all the things mentioned above, and, I found myself here again tonight.
Running from a nrwl mono repo, I had to cd into the app that was having the problem and run.
jest --clearCache
You should first quit the metro terminal before executing
npm add #babel/runtime
npm install
You should add and install babel for your projects
npm add #babel/runtime
npm install
If The error is not fixed, Try:
npm start --reset-cache
The issue for me was that #babel/runtime was installed as a dev-dependency instead of just a normal (non-dev) dependency
Try to update your npm version first
npm update -g npm#version or sudo npm -gf update npm#version
and then just add the babel runtime at your react native project
npm add #babel/runtime
Try upgrading your packages. You could have an old package causing the problem:
yarn upgrade-interactive --latest
Current error message suggests these steps to fix this:
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-*
The last one solved it for me.
I had this problem today (April 2021), and I could solve it only by removing the webpack-node-externals package from my webpack configuration.
For me the solution was (Mac):
Stop IntelliJ
Enter terminal
Run: npx browserslist#latest --update-db -g
Run: npm cache verify
Start IntelliJ
If still not working:
Delete node_modules fron project if exists
Run: npm cache verify
Run npm install -f in project
Run: npx browserslist#latest --update-db -g
Problem:
I was in the middle of upgrading flow to typescript and I used #khanacademy/flow-to-ts to convert js files to ts. the lib not only changed the js files of the app but also it converted all js files in node_modules directory.
Solution:
I had to remove the node_modules and npm -i. This time when I checked the node_modules the interopRequireDefault.js file was there.
In case you are working with Yarn workspaces please note you are running react-native start from the right project...
Install latest Babel/runtime
=> install #babel/runtime
After that clean or reset the cache
=> npm start -- --reset-cache after
or
npm cache clean --force
I accidentally deleted my node_modules and package-lock.json. I used npm i to regenerate them and suddenly I was getting the above error. I solved it in two ways.
By uninstalling the app and using the following commands.
npx jest --clearCache
npm update
npm i
npx react-native run-android
By deleting the local repository and re-cloning it.
Hope this helps you.
I just uninstalled watchman. It worked for me.
brew uninstall watchman
Someone may find this helpful. I had the same problem while using turborepo and Expo.
Resolved it by adding 'node-linker=hoisted' to .npmrc.
Had this issue none of the above listed solutions worked for me, I had to go to node_modules/jest-haste-map/build/index.js
changed const crawl = canUseWatchman && this._options.useWatchman ? _watchman.default : _node.default;
to const crawl = canUseWatchman && this._options.useWatchman ? _node.default : _node.default;

Unable to resolve module React-Native

I'm following a tutorial however have not been able to get any help from the course owner or fellow students so please help.
I'm encountering the Unable to resolve module error seen below in Windows 10.
This has been after I have created a new react native project, executing all the commands from the command line:
react-native init techstack
And then adding within command line of the project directory:
npm install --save redux react-redux
I have followed the advice given in the error message running first:
npm rm -rf node_modules && npm install
And then
npm watchman watch-del-all
And finally trying:
npm rm -fr $TMPDIR/react-*
And also:
npm start -- --reset-cache
However no matter what I tried it still did not resolve the issue and the exact same error persisted
It looks like the error came from not finding the src/app module. It's not from the node-modules or watchman. Check the imports in the index.android.js.
Please enter ./src/app instead of .src/app

error: bundling: UnableToResolveError: Unable to resolve module react/lib/ReactComponentTreeHook

Why? Why is react looking here? I have another test android project and it also does not have react package located there, yet it runs perfectly. Why is this one looking here? The only difference is I first did setup a directory below. In MyProject/App is where i did the init. I then moved the index.js files and package.json a level up to top level directory. I want to know the WHY of this error!
Here is the error:
error: bundling: UnableToResolveError: Unable to resolve module
react/lib/ReactComponentTreeHook from /Users/Admin/Projects/MyProject/node_modules/react- native/Libraries/Performance/Systrace.js:
Module does not exist in the module map or in these directories:
/Users/Admin/Projects/MyProject/node_modules/react- native/node_modules/react/lib
, /Users/Admin/Projects/MyProject/node_modules/react/lib
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 packager cache: rm -fr $TMPDIR/react-* or `npm start --reset-cach
All these steps I have tried. They don't fix it. I will probably do another init a level above but still I want to know whey it's looking there. Is there a module map being setup somewhere incorrectly? Where do I look for this?
UPDATE: After doing init properly in the root directory of the app I now get something else:
Loading dependency graph, done.
error: bundling: UnableToResolveError: Unable to resolve module react/lib/ReactDebugCurrentFrame from /Users/Admin/Projects/MyProjectRoot/node_modules/react-native/Libraries/Renderer/src/renderers/shared/stack/reconciler/ReactCompositeComponent.js: Module does not exist in the module map or in these directories:
This leads to suggestions that you need alpha version of react to go along with latest react:
https://github.com/facebook/react-native/issues/13017
But doing this does not work. It just leads back to the same issue I had to begin with about ReactComponentTreeHook.
Again, same suggestions about how to fix it. rm -rf node_modules followed by npm install! But I also did a npm install --save on react react-native. I think I need some response from react-native team on how to properly interpret this kind of error. What's going on here?
Xcode 8.2 still occur same error. Three lines bellow fixed it for me :)
Downgrade react(16.0.0-alpha.12 -> 16.0.0-alpha.6) & react-native(0.45.0 -> 0.44.0)
rm -rf node_modules/react
npm i react#16.0.0-alpha.6 -S
npm i react-native#0.44.0 -S
Then run react-native run-ios
Hope this help.
The problem is that the npm init, npm install --save react -react-native does not install the correct versions. What you need to do is look at the version of react inside package.json In my case it was an alpha.
So right now need to do:
npm install --save react#16.0.0-alpha.6 react-native
but check what's inside your package.json and watch any warning messages carefully
Try install react-native-git-upgrade
$ npm install -g react-native-git-upgrade
and then run
$ react-native-git-upgrade
for me it works.
This error happens when someone upgrade react-native version.
$ npm install -g react-native-git-upgrade
$ npm install react-native#latest --save
$ react-native-git-upgrade
Close all terminals.
Then clear cache. Remove directory ~/Library/Developer/Xcode/DerivedData
In Xcode, Product-> Clean
Then run simulator from Xcode or run code on the attached device again.