I am setting up react-native and expo on my machine.
When i run expo start in my terminal i get a blank white screen with the text "An unexpected error has occurred" And also when i scan the QR code i get "Network response timed out".
I tried following all the steps on setting up my expo environment using the docs so i do not know where i went wrong and how to resolve it.
I even tried deleting and reinstalling expo-cli on my machine.
I am using linux and I have expo-cli#5.6.0 installed.
Found the solution! Apparently expo-cli v5.4.10 or greater versions has some issues with the web interface. Rolled back to 5.4.9 and DevTools work again now. This is the rollback command
npm install expo-cli#5.4.9 --location=global
For uninstalling the Previous CLi you can use
yarn global remove expo-cli
or
npm -g uninstall expo-cli --save
if you are using npm
Related
I recently tried to launch my project on a new computer. I downloaded the source code from its repository and ran npm install to get all the needed packages.
However, when I run npm start or expo start:web, I get the error:
Cannot find module '#expo/metro-config'
I ran npm install #expo/metro-config and the install run without issue, but I still get the “Cannot find module '#expo/metro-config'” error.
The only post I saw regarding this error recommends editing the metro.config.js but I do not use one.
I am on SDK 42, and the project launches fine on my other computer. Any idea what is happening?
FYI, I use to perform this whole operation without any issue until now.
UPDATE:
I ran npm install -g #expo/metro-config and now I get the error Cannot find module 'resolve-from'
So it looks like maybe running npm install -g expo-cli doesn't actually install all the necessary packages? Could it be the issue?
I managed to make it "work" (get other missing packages errors down the line) by reverting to expo-cli 4.7.3. Anything from 4.8.0 and above will cause the error.
Something else is that on a fresh npm install, after running npm install -g expo-cli, if I try to create a project with expo init, I will get the error Error: Cannot find module 'kleur'. Running npm install kleur fix it, but maybe that's also a clue.
Expo was working fine until I did an npm install native-base --save and it keeps crashing every time I try to start it. I'm on Mac and have am using my real mobile devices to view the changes in my project.
I've uninstalled the native-base but am not sure how to replace the missing files.
Refer to error message screenshot here
Managed to find a solution for now (thanks to #brentvatne).
I updated the packages, including node:
brew update
brew upgrade node
And when I started Expo, another error came up - EMFILE: too many open files, watch at FSEvent.FSWatcher._handle.onchange
The error is caused by Watchman, to which I resolved it with:
brew install watchman
I am using react native and Expo. I am unable to build new app because after I use expo init appName it shows the following error.
Heres the full message:
📦 Using npm to install packages. You can pass --yarn to use Yarn instead.
√ Downloaded and extracted project files.
× Something when wrong installing JavaScript dependencies. Check your npm logs. Continuing to initialize the app.
✅ Your project is ready!
To run your project, navigate to the directory and run one of the following npm commands.
- cd Scanner
- npm start # you can open iOS, Android, or web from here, or run them directly with the commands below.
- npm run android
- npm run ios # requires an iOS device or macOS for access to an iOS simulator
- npm run web
I tried multiple times to create a blank project, also tried npm install to install failed/not downloaded libraries and continue after failure but it showed another error:
npm ERR! code Z_BUF_ERROR
npm ERR! errno -5
npm ERR! zlib: unexpected end of file
also tried npm cache verify that showed cache is ok Content verified: 3562 (252580364 bytes).
So, How can I solve this issue?
Problems related to npm installation are very common If you do any mistake in early installation, but is avoided. Learn more about npm tree.
Steps worked for me are :
npm cache clean --force
npm cache verify
npm -g uninstall expo-cli --save
npm install expo-cli --global
expo init app-name
cd app-name
npm start
Always run as administrator if working on Windows and in root directory.
The solutions above didn't work for me but if you use 'npm install' in the directory of the app you get a clue that you shuold try 'npm install --force'
err message
You should have all these files folders and files at the start of the project otherwise not all the dependencies have been installed which is why we were getting the problem.folder structure
After you have added --force to npm install you have all the dependencies installed. Now you can run the app with npm start.
Unfortunately, all the solutions described above didn't work on my machine...
Here is my latest solution for this problem...
This worked 100% on my machine...
Use npm i -g expo-cli
This will automatically add the required packages and also remove the unnecessary ones.
Yes, surely, you don't need to uninstall and re-install it again.
Just follow my steps.
And, you can create your expo project using expo init.
I hope my solution will help you out from this annoying problem....
I just did npm install and it worked for me, but I had do that every time I create a new expo project.
I also encountered this problem, and finally found that it was the problem of react native cli，I installed the latest version of react native cli，Expo is back to normal
This Error is regarding to the git account. expos need a git account to setup react native project
If you are using windows you need to install git in your local PC
after that open your Terminal and type this command
git config --global user.name "your_username"
git config --global user.email "your_email_address#example.com"
after that clone any github project to your local computer. it will ask to login to Github
after all these steps try expo init <projectname>
The simple way to settle that error is by using "expo-cli init app-name" instead of "expo init app-name".
I tried and worked perfectly for me. Hope it will help you guys.
i have faced a similar problem and running yarn set version 1.22.1 fix it
Run the Command Prompt as an administrator. And run the following command:
npx create-expo-app AwesomeProject
I am working on React native new project when I enter npm start I got this error on my Mobile with blue screen Uncaught Error: 36.0.0 is not a valid SDK version. Options are 35.0.0, 34.0.0, 33.0.0, UNVERSIONED. I tried to solve this error by using these commands
npm install (for node module)
expo update
npm install react-native-gesture-handler --save
npm start
But It didn't work, please help me to resolve this issue.
As said here, you can try to delete the expo client on the emulator, and run the project again. This should work.
Here's the documentation of how to upgrade your expo version, but i think you don't will need it, because you're on the latest version.
I followed instructions to install Expo on my Windows 10 machine. I'm running node version 10.14.0 on my machine.
After I issued expo init command and created the first project, running npm start shows a message that reads:
This command requires Expo CLI. Do you want to install it globally
[Y/n]?
Strange thing is that I'd already installed the latest version of expo-cli globally. Running expo-cli --version in the project folder gives me the version of expo-cli which is 2.5.0.
From here, it gets worse. No matter what I choose, I get the following error:
Any idea how to fix this issue?
I had the same issue, first run:
npm i expo-cli
then:
npm start
Worked for me
first type:
npm i expo-cli
then type :
expo start
In my case I had the same error, so I went to the expo documentation (https://docs.expo.io/versions/latest/get-started/installation/), to see the error.
First I logged into the expo:
expo login --username -u [username] --password -p [password]
and then I checked if I was logged in:
expo whoami
Second I followed this help that I found on stackOverflow:
How to resolve the error on 'react-native start'
Hope this helps.