I am trying to develop a react native application on MacOS, but I have been running into issues with installing watchman onto the machine. I have been running the command brew install watchman and whenever I enter the command watchman version the output displays version: 0.0.0. However, directly after running the first installation command over again, I see Warning: watchman 2022.06.06.00 is already installed and up-to-date which is really confusing me.
I have tried various different troubleshooting techniques such as uninstalling and reinstalling watchman, instead of using brew I attempted using sudo port install watchman with MacPorts, removing the .watchmanconfig file and re-creating it, and lastly restarting my device, but none of these solutions have seemed to work for me.
Whenever, I open my react native project and run the command npm start, this is the output that I see,
jest-haste-map: Watchman crawl failed. Retrying once with node crawler.
Usually this happens when watchman isn't running. Create an empty `.watchmanconfig` file in your project's root folder or initialize a git or hg repository in your project.
...
watchmanResponse: {
error: 'std::__1::system_error: open: /Users/USER/Desktop/ReactNativeApp: Operation not permitted',
version: '0.0.0'
}
This error message ends the npm start and because of this, I am unable to run npm run ios and continue with the development of the application. If anyone happens to know of any fixes or has experienced this before I would appreciate it if you share how I can resolve it. Thank you.
We can resolved this when we put our project outside from those folder Desktop,Download and Document
then run
npm start
It will be work
thanks
recently my Fast Refresh stopped working across ALL of my react native projects, I have even tried init-ing a new project and it is not working there too
I have tried all the attempts below:
-. watchman watch-del-all
-. rm -rf /usr/local/var/run/watchman && brew uninstall watchman && brew install watchman
-. clean node_modules and "npm run -- --reset-cache"
Whatever way I try to reload the app after modifying the source code, the change will not get reflected. I have to stop and uninstall the app, run npm run -- --reset-cache and then run npm run android again in order to have the changes reflected.
This is really killing me as I can not find the cause of it. It was working before and I did not install any app on my machine. I am now short of formatting my machine and start everything from scratch again but this is a Mac and it is troublesome to reformat..
It's not related to react-native, metro bundler, or sudo permission,
It's because of .git/index.lock file!
Just remove it and everything would be OK.
Execute this command in the root directory of your project:
rm .git/index.lock
Have you tried ALL the solutions mentioned here? Seems like there're still a bunch that you haven't tried
https://github.com/facebook/react-native/issues/28420
I tried almost all and still not working, in desperation, the
sudo npx react-native start solved my problem
https://github.com/facebook/react-native/issues/28420#issuecomment-755082770
This doesn't answer the question, but I'm leaving it for people who come here with a slightly different issue.
If after making a code edit, the app shows a message saying 'Refreshing...' but it fully reloads the app, then that means Fast Refresh and Hot Reloading is technically working. But for whatever reason, Fast Refresh is falling back to a full reload. To fix this, see this thread. Basically, name your default exports.
Running react native app in android emulator using port 8088 and I see this error.
I have tried running in default port 8081 and the basic app welcome page works ok but the changes are not reflected in the app. My work mcafee uses the same port so I have changed the port in Android emulator to '10.0.2.2:8088' and tried running react-native run-android --port 8088 and I see the error as shown here :
I have tried manually pasting index file to react-native/scripts folder, now I see this :
Thanks for your help.
I fixed it using a post in https://github.com/facebook/react-native/issues/23908. Copied few files to older version and tried to restart the app in port 8088 - worked ok. Can see the changes reflected too :)
I think you need to reverse your ports too.
enter this command on the project root
$ adb -s <device name> reverse tcp:8088 tcp:8088
also, check the link below for more info
https://facebook.github.io/react-native/docs/running-on-device
The solution is already given in the red screen above. They have suggested you to do the following.:
watchman watch-del-all
rm -rf node_modules && npm install
npm start --reset-cache
rm -rf /tmp/haste-map-react-native-packager-*
Try these commands while you're in root folder of App.js and running bash terminal. I had solved my problem just deleting node_modules folder and reinstalled node modules by npm install and then restart the app. Everything worked out fine!
I have React-native project. When I want to start it, I run npm start or yarn start, and I get this:
$ yarn startyarn run v1.7.0
$ react-native-scripts start
11:36:37: Starting packager...
***ERROR STARTING PACKAGER***
No issue with doctor-watchman-version
No issue with doctor-problem-checking-watchman-version
No issue with doctor-both-app-and-exp-json
No issue with doctor-schema-validation
No issue with doctor-validate-asset-fields
No issue with doctor-schema-validation-exception
No issue with doctor-unversioned
No issue with doctor-versions-endpoint-failed
No issue with doctor-invalid-sdk-version
No issue with doctor-node-modules-missing
No issue with doctor-react-native-not-installed
Starting Metro Bundler on port 19001.
Metro Bundler ready.
jest-haste-map: Watchman crawl failed. Retrying once with node crawler.
Usually this happens when watchman isn't running. Create an empty `.watchmanconfig` file in your project's root folder or initialize a git or hg repository in your project.
Error: Watchman error: too many pending cache jobs. Make sure watchman is running for this project. See https://facebook.github.io/watchman/docs/troubleshooting.html.
If I uninstall wathcman Packeger get stucked.
Creating .watchmanconfig file, also didn't help.
(Linux Mint OS)
Hours of searching. I have not found a solution yet :(
Try this:
npm r -g watchman
brew update && brew upgrade
brew install watchman
watchman shutdown-server
This command from this GitHub issue worked for me
Try this:
$ npm install
If you are using visual studio, in the bottom of the view there is button to restart. click that and run
I recently started with react-native. I install it using the tutorial on the Facebook site and everything works well for a day or two until this message comes up:
'react-native' is not recognized as an internal or external command,
operable program or batch file.
Nothing works except uninstalling everything and starting all over again. The environments are ok and work (npm, choco, etc.). I have also tried removing and adding react-native to environment variables, restarting, and running cmd in administrator mode, but nothing so far. I should add that I use windows 10 64-bit.
I had the same issue and tried the following but didnt work
Adding npm path to my Environment variables; both system and user
Re install npm and react-native-cli
Both didn't work for me, im using Windows 10;
Solution that worked for me is to install react-native-cli globally
You can install it globally by using the below command:
npm install -g react-native-cli
You can simply use npx react-native <command> it will work
npm install -g react-native-cli
But dont forget to restart command promprt
Your system or user environment PATH variable was edited, you can uninstall NodeJs and install it again or add the below path to the end of PATH variable into user variables the restart the Windows :
C:\Users\[USER-NAME]\AppData\Roaming\npm
this should work.
You need to setup the npm path in your environment variables. Please look at the images down below
Then follow the command : for installing -g ( global ) for cli in your system
npm install -g react-native-cli
I get the same error right off the bat on Windows 10 running in cmd window in adminstrator mode, however there is also a bash shell version of react-native that worked for me in a git bash window.
cmd:----------------------------------------------
C:\Users\David\Documents\react>where react-native
C:\Users\David\AppData\Roaming\npm\react-native
C:\Users\David\AppData\Roaming\npm\react-native.cmd
C:\Users\David\Documents\react>react-native init AwesomeProject
'react-native' is not recognized as an internal or external command,
operable program or batch file.
git bash:----------------------------------------
David#CYBER-PC ~/Documents/react
$ react-native init AwesomeProject
This will walk you through creating a new React Native project in c:\Users\David\Documents\react\AwesomeProject
Installing react-native package from npm...
Setting up new React Native app in c:\Users\David\Documents\react\AwesomeProject
AwesomeProject#0.0.1 c:\Users\David\Documents\react\AwesomeProject`-- react#15.3.1
To run your app on iOS:
cd c:\Users\David\Documents\react\AwesomeProject
react-native run-ios
- or -
Open c:\Users\David\Documents\react\AwesomeProject\ios\AwesomeProject.xcodeproj in Xcode
Hit the Run button
To run your app on Android:
Have an Android emulator running (quickest way to get started), or a device connected
cd c:\Users\David\Documents\react\AwesomeProject
react-native run-android
npm install -g react-native-cli
I had to add the %APPDATA%\npm folder to my PATH on Windows 10. Global modules are installed there.
If uninstalling and installing again the npm did not work on you, try adding %APPDATA%\npm to path (Environment variables) then quick reboot/restart. System Reboot should really be part of the process. This worked on my end.
Install :
npm install -g react-native-cli
Uninstall :
npm uninstall -g react-native-cli
If you are following the getting started guide for Windows/Android, they recommend installing nodejs via Chocolatey. But Chocolatey likes to have administrator rights when it installs things. If you're just a regular user, this seems to interfere with how npm installs react-native-cli. In my case, the react-native command was only recognized when I launched a command prompt as admin.
What I did to fix:
launched command prompt as admin
uninstalled react-native-cli globally: npm uninstall -g react-native-cli
uninstalled nodejs via Chocolatey: choco uninstall nodejs
Now, as a regular user without admin rights:
installed nodejs via the nodejs website (not Chocolatey)
installed react-native-cli globally: npm install -g react-native-cli
I uninstalled node.js and then reinstalled it, and it worked like a charm
just uninstall the node.js and reinstall it..
then install the cli package typing command
npm install -g react-native-cli..
now you are ready to make your project.
To make project open a folder from your drive wherever your folder is located.
Then type command
react-native init albums
it will create a project for you inside your directory.
None of the above mentioned solutions worked for me. What did work was to remove nodejs, and reinstall it via Chocolatey with the following command:
PS > choco install -y nodejs.install python2 jdk8
> npm install -g react-native-cli
C:\Users\user\AppData\Roaming\npm\react-native ->
C:\Users\user\AppData\Roaming\npm\node_modules\react-native-cli\index.js
+ react-native-cli#2.0.1
added 41 packages from 15 contributors in 4.528s
I had this problem also becuase I restored my files from a previous OS installation. My problem was a wrong prefix in my C:\Users\user_name\.npmrc file.
Run npm config list and make sure that all your npm config variables are leading to the correct file paths. Delete the .npmrc file if you want have it to go back to the defaults. That's what I did and react-native command is working for me again.
I hope this helps.
i have no clear idea but below steps worked for me.
delete Node Modules
Uninstall react-native cli. This is Recommended in the react-native Documentation
"If you previously installed a global react-native-cli package, please remove it as it may cause unexpected issues."
npm uninstall -g react-native-cli
clean gradlew. in your project folder, go to the android folder by typing cd android
and run gradlew clean
move back to your project folder cd .., then run
npx react-native run-android
these steps worked for me. took some time when running first time.
use node.js stable version or recommended version.
On window 10, nodejs>11 global node libraries seems to be installed in C:\Users\your_user_name.npm-global. So you need to set the variable to point to that path
I had problems because of this strange mistake.
I checked to see if it was globally loaded again
I didn't delete all packages
I even deleted C:\Users[USER-NAME]\AppData\Roaming\ npm manually, but there was no solution.
The only thing that is the solution is to use the current version of node.js.
uninstall nodejs completely(restart your pc) and reinstall it using chocolatey and follow other commands from https://facebook.github.io/react-native/docs/getting-started.
worked perfectly fine for me!
Even if you have installed react-native globally and still get the same try adding path of npm module (C:\Users\your user name\AppData\Roaming\npm) to system variables instead of user variables.
I know it's too late, anyway
Make sure you've added the path of the NPM in system variable rather than user variable in the System Environment Variables.
PATH : C:\Users\user_name\AppData\Roaming\npm
Open a the command prompt and type: npm config list:
Get the path underlined in red and add it your system path (change two back slashes into one), for example: C:\Users\YOURNAME\AppData\Roaming\npm.
This solved the issue for me
I just wrote "react-native -v" to console to check have I still react-native and then just I wrote "react-native run-android" again and this time it worked. Yes just that. React native is terrible technology.
Looks like I have uninstalled react native cli by mistake, I tried all answers mentioned above, but the below command worked for me.
npx react-native run-android.
Solution
I was facing 'react-native' is not recognized as an internal or external command,operable program or batch file error when I was running react-native start in VsCode.
I Solved it by running npm install -g react-native-cli in PowerShell
Steps to follow
run PowerShell as admin (important step)
run running npm install -g react-native-cli in PowerShell
close VsCode and rerun it
that's all!
I solve this problem by running
npm install -g react-native-cli
then another error appears
Command run-android unrecognized.
I fixed this error by
npm install
Use npx before your command
npx react-native
Not just
react-native
if you faced the same issue as me just type :
npm i react-native
then try to create a new project as its recommended by the react native doc by typing :
npx react-native init yourProjectName
this should resolve your problem
hope this was helpful