I have followed guide here to setup react-native 0.23 https://facebook.github.io/react-native/docs/getting-started.html#content
I tried to run
react-native run-android
and got the following
Looks like you installed react-native globally, maybe you meant
react-native-cli? To fix the issue, run: npm uninstall -g react-native
npm install -g react-native-cli
and I tried above command to uninstall and install but still getting the samething.
I google and found some solution at Packager won't start
Tried:
"scripts": {
"start": "$NVM_BIN/react-native start"
}
and
react-native start
both still didn't work. For iOS no problem as I fired up XCode to run it. I have also installed VirtualBox and Genymotion as emulator.
Related
Today I tried to do things differently, and launched a react-native project with npx, and went into troubleshooting issues like react-native command not found, are you sure this is an android project, etc. while things were easier with expo and react-native init.
So I'm wondering, according to you, what are the advantages, what does npx more ?
npm:
npm create-react-app my-app executes the local create-react-app package from your machine, so you first have to install it globally on your system with npm install -g create-react-app.
npx:
If you run npx create-react-app my-app and don’t have create-react-app globally on your system, it will get downloaded and not installed globally.
As you are getting "react-native command not found", first make sure to have react-native cli installed globally. For that,
npm i -g react-native-cli
Then create your react-native project.
I have been working with react-native project in another pc and it has been working correctly. Now I cloned project to another device where I have react-native installed since I work with other project and I cannot run it.
When I run react-native run-android I get this error:
Cannot run program "npx": error=2, No such file or directory
I'm using Android Studio 4 on Mac OS Catalina 10.15.6.
I solved the problem by running Android Studio with bellow command on console.
$ open -a "Android Studio.app"
Simple steps you need to go through to make it work with npx
sudo npm uninstall -g react-native-cli
sudo npm i -g npx
npx react-native run-android
More detailed explanation why this is happenig
Issue was that Facebook is not using anymore react-native-cli as they are using npx.
As stated in Facebook page:
If you previously installed a global react-native-cli package, please remove it as it may cause unexpected issues.
So i had to run sudo npm uninstall -g react-native-cli to remove react-native-cli
They also say that npx is shipped with nodejs but that wasn't my case.
React Native has a built-in command line interface, which you can use to generate a new project. You can access it without installing anything globally using npx, which ships with Node.js.
So I had to install it using sudo npm i -g npx
After installing npx then just need to run npx react-native run-android.
Be aware of npx before react-native run-android
Now you don't have any command react-native now we only have 'npx' and react-native run-android is just a parameter for npx. For ex. to start metro we should run npx react-native start
I had the same issues, so I followed these steps:
Start by installing the latest version of Android Studio (Don't delete the old version, just copy paste that to another directory or in my case I just added the Android Studio 3.2.1 that I had to a folder called olderAndroidStudio, on mac).
Make sure you don't click on import settings from Existing.
Follow along the installation, and complete it.
Build and Run, app runs without any problems.
I additionally uninstalled react-native-cli using the method given in the accepted answer.
In my case, I just quit Android Studio and reopened, and the error was gone.
Maybe throw in a ./gradlew clean for goo measure.
I solved it by finding the command that was throwing error and ran it directly
node -e "console.log(require('react-native/cli').bin)"
which outputs a path, something like
$HOME/my-app/node_modules/#react-native-community/cli/build/bin.js
then I pasted that path in android/app/build.gradle
project.ext.react = [
entryFile: "index.js",
enableHermes: true, // clean and rebuild if changing
cliPath: "$HOME/my-app/node_modules/#react-native-community/cli/build/bin.js" // <--- add this
]
running on my device used to work fine. However, suddenly,
when I run react-native run-ios --device,
I get to the ending like
[[ true != true ]]
** BUILD SUCCEEDED **
installing and launching your app on User’s iPhone...
However, nothing happens after and the app does not get installed in my device.
For me the following worked a while back when I faced a similar issue:
>npm install -g ios-deploy
>react-native run-ios --device "My iPhone"
I seriously offer you to install ios-deploy by using brew:
brew install ios-deploy
If you installed it by npm before installing by brew uninstall it by the following command:
sudo npm uninstall -g ios-deploy
After having the correct version with the correct installation plug your device and then run the below command:
npx react-native run-ios --device
This current command directly installs the app on the first plugged device to your macOS system. if you plugged several devices then you should pass the name of a targeted device just like below:
npx react-native run-ios --device "DeviceName"
I just updated my react native project to version 0.45
and when using this command : react-native run-ios on the root of this project
I am getting this error :
Cannot find entry file index.ios.js in any of the roots ....
and i can see that the server is trying to look for JS files in
Looking for JS files in
/Users/someUser/Code/ReactTest/node_modules/react-native/packager
when using this command : npm run start -- --root .
i can see that the server is looking for js file in the correct location
Looking for JS files in
/Users/someUser/Code/ReactTest
and every thing is working from here
why the react-native run-ios is try to look in the wrong location ?
I ran into this issue today. As noted here it has been corrected as of version 0.45.1, but this turned out to be a red herring for me.
The most telling problem in my case was that index.ios.js didn't actually exist anywhere in my project, only in some places in node_modules. It turns out that, because I'd initialised the project with the create-react-native-app command, I had to:
npm run eject
You can read more about the eject command here.
If you still have issues, try the below.
Check your dependency versions. Here are my RN packages:
"react": "16.0.0-alpha.12"
"react-test-renderer": "16.0.0-alpha.12"
"react-native": "^0.45.1"
Update your dependency managers. These worked for me:
$ yarn --version
0.18.1
$ npm --version
4.6.1
Clean your cache(s). WARNING - CONTAINS rm -rf, COPY WITH CARE.
watchman watch-del-all
rm -rf ./node_modules
yarn cache clean
rm -rf $TMPDIR/react-*
yarn install
npm start -- --reset-cache
After that last npm start, hit CTRL+C and ensure there are no dormant npm processes running in the background. Then, try react-native run-ios again.
The react-native launched new release 0.45 a few days back. So, the commands to create a react-native application and running locally have many differences.
npm install -g create-react-native-app
Then run the following commands to create a new React Native project called "AwesomeProject":
the new way of creating a react-native application as follows
create-react-native-app AwesomeProject
cd AwesomeProject
npm start
Please follow the official documentation for creating an application and running the application on locally. hope the below link will help you.
https://facebook.github.io/react-native/docs/getting-started.html
Once you've set these up, you can launch your app on an Android Virtual Device by running npm run android, or on the iOS Simulator by running npm run ios(macOS only).
Enjoy, Happy coding :)
I have two different ReactNative-Projects:
a) a project from januar 2016
b) a complete new react-native project
from now (march 20th 2016)
Within the new project the cli tool of react-native contains the command "run-ios" next two "run-android", but not on the older project from januar 2016. On the older one there is not "run-ios" command available:
$ react-native run-ios
Command `run-ios` unrecognized
Usage: react-native <command>
I already ran "react-native upgrade" without any issues.
How can i get the command "run-ios" also in older projects?
Just update the version of react native in your project with the following command:
$> npm install --save react-native#latest
What caused this for me was running npm install --save [package] when actually the system has previously been using yarn instead of npm.
To solve this I just deleted the node_modules folder and ran: yarn install and after that react-native run-ios (or android) works fine.
$ react-native run-ios
If you get this kinda error:
"Command run-ios unrecognized. Make sure that you have run npm
install and that you are inside a react-native project".
In terminal, make sure you are inside a react-native project directory.
Execute this cmd:
$ react-native -v
react-native-cli: 2.0.1
react-native: n/a - not inside a React Native project directory
$ npm update
$ react-native -v
react-native-cli: 2.0.1
react-native: 0.44.0
$ react-native run-ios
This may sound silly, but make sure you cd to your project directory. If that fails then perform the npm install in the other answers.
I found a solution that works for me.
Update the version of react native in your project:
npm install --save react-native#latest
then upgrade your npm version
npm i npm#latest -g
then move directory folder 1 level up, type
cd ..
make a new react-native installation folder
react-native init NewProject
then go to your project folder(NewProject), after that
react-native run-ios
should work fine.
This happens when the project has an older version of react native. You can update the react version or for people who do not want to upgrade, just open the .xcodeproj file in iOS dir and hit the play button in the Xcode.
In my case, it was an issue with the package.json file. I deleted a section during a test. I recover a previous file with the deleted section and everything was working again.
this works for me
sudo npm install -g react-native-cli --force
then
react-native run-ios
In my case, I am using monorepo with multiple packages in a single repo. I solved this error by
Deleting the packages/myapp/node_modules
running yarn install from the project root. Not inside packages
its solved. Now can run yarn ios or yarn android commands
Note:
For autolinking libraries you need to have all of your dependencies in root package.json file also copied to packages/myapp/package.json file. See https://github.com/react-native-community/cli/blob/master/docs/autolinking.md#how-can-i-use-autolinking-in-a-monorepo
Example:
"dependencies": {
"#react-native-community/datetimepicker": "^3.5.2",
"#react-native-community/masked-view": "^0.1.11",
"#react-navigation/native": "^5.9.4",
"#react-navigation/stack": "^5.14.5",
"#reduxjs/toolkit": "^1.6.0",
"#voximplant/react-native-foreground-service": "^2.0.0",
"axios": "^0.21.1",
"babel-eslint": "^10.0.3",
"eslint-config-airbnb": "^18.0.1",
"eslint-plugin-import": "^2.18.2",
...
...
but make sure NOT TO COPY
"react-native-cli": "^any version",
otherwise react-native-cli would collide and you will continue to see error like
Command `run-android` unrecognized. Make sure that you have run `npm install` and that you are inside a react-native project.
error Command failed with exit code 1.
or
Command `run-ios` unrecognized. Make sure that you have run `npm install` and that you are inside a react-native project.
error Command failed with exit code 1.
I created a brand new react-native project using
$ react-native init projectName
and ran from root of the project
$ react-native run-ios
Everything worked fine and iOS simulator fired up as expected.
Than I installed prop-types node module using npm install prop-types --save. Re-ran $ react-native run-ios and ran into this error Command run-ios unrecognized
Solution:
From the root of my project, removed node_module and re-installed modules using npm. Commands below
$ rm -rf node_modules/
$ npm install
$ react-native run-ios
For me, Xcode was already running.
Close the Xcode and then in the terminal, make sure you are inside a react-native project directory and then execute react-native run-ios command
For me, the only thing that worked was to checkout again my repository from zero and run:
npm install -g react-native-cli yarn
yarn
git submodule update --init --recursive
What caused this for me was running npm install --save axios when actually the system was previously using yarn instead of npm.
To solve this, instead of deleting the node_modules folder, which can lead to more problems, and if you prefer to run npm anyway or don't have a preference either way, the error should have instructed for you to run npm install. If you literally follow those instructions, you will be able to run: react-native run-ios afterwards.
I also fell in this error and the reason was
I was using yarn link command in wrong folder
Delete the node-modules. Its because the packages are not installed.
rm -rf node_modules
npm install
then run your project
react-native run-ios