Develop Reference

Can't install expo-cli -g

I'm new in react-native, I'm trying to set up my project after all package install when I tried to start npm start command then show me 'expo-cli' is not recognized as an internal or external command, this error.
ok, then I have followed the guide from here
after that I have added my env path in this way:
environment variable > System Variables > PATH >
C:\Users\YOUR_USERNAME\AppData\Roaming\npm
then I have to install again:
npm install -g expo-cli
but it does not work for me, I don't know why.
when I try to run this command npm install -g expo-cli then show me an error like this:
PS C:\Users\alami\OneDrive\Desktop\React native\starter-react-native> npm install -g expo-cli
npm ERR! code EPERM
npm ERR! syscall mkdir
npm ERR! path C:\Program Files\nodejs\node_modules\expo-cli
npm ERR! errno -4048
npm ERR! Error: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_modules\expo-cli'
npm ERR! [Error: EPERM: operation not permitted, mkdir 'C:\Program Files\nodejs\node_modules\expo-cli'] {
npm ERR! errno: -4048,
npm ERR! code: 'EPERM',
npm ERR! syscall: 'mkdir',
npm ERR! path: 'C:\\Program Files\\nodejs\\node_modules\\expo-cli'
npm ERR! }
npm ERR!
npm ERR! The operation was rejected by your operating system.
npm ERR! It's possible that the file was already in use (by a text editor or antivirus),
npm ERR! or that you lack permissions to access it.
npm ERR!
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\alami\AppData\Local\npm-cache\_logs\2021-05-21T00_58_34_585Z-debug.log

At least I just solved my problem in this way:
Search cmd
Then run as administrator
Then npm i -g expo-cli
I just solved my problem.

I couldn't create react app by using the cmd "npx create-react-app"

I tried npx create-react-app my-app and here's the error:
(ps: I tried npm init npm install create-react-app and then the cmd showed above. got the same err) HELP!
Installing packages. This might take a couple of minutes.
Installing react, react-dom, and react-scripts with cra-template...
npm ERR! code 1
npm ERR! path /Users/atomxv/Desktop/my-app/node_modules/canvas
npm ERR! command failed
npm ERR! command sh -c node-gyp rebuild
npm ERR! SOLINK_MODULE(target) Release/canvas-postbuild.node
npm ERR! CXX(target) Release/obj.target/canvas/src/backend/Backend.o
npm ERR! CXX(target) Release/obj.target/canvas/src/backend/ImageBackend.o
npm ERR! CXX(target) Release/obj.target/canvas/src/backend/PdfBackend.o
npm ERR! ../src/backend/Backend.cc:111:10: warning: address of stack memory associated with local variable 'msg' returned [-Wreturn-stack-address]
npm ERR! return msg.c_str();
npm ERR! ^~~
npm ERR! 1 warning generated.

You’ll need to have Node >= 10 on your local development machine. Also you dont have to do npm init npm install create-react-app

Node.js- "npm install express" error:0906D06C :PEM routines : PEM_read_bio npm

I have installed node.js and it has npm installed along with it. In my windows command prompt,when i write "npm install express", it gives me the following error.How to resolve this?
C:\Users>npm -v
2.11.2
C:\Users>npm install express
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\Program Files\nodejs\\node.exe" "C:\Program
Files\nodejs \node_modules\npm\bin\npm-cli.js" "install"
"express"
npm ERR! node v0.12.5
npm ERR! npm v2.11.2
npm ERR! error:0906D06C:PEM routines:PEM_read_bio:no start line
npm ERR!
npm ERR! If you need help, you may report this error at: npm ERR!
https://github.com/npm/npm/issues
npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\npm-debug.log

I also got same problem after setting registry problem got resolved.
cmd>> npm set registry registry.npmjs.org
cmd>> npm install
it worked for me.

Angular js wont install on my machine

I have node.js installed on my machine, I have version: v0.12.0 installed. Following instructions when I use sudo npm install I get these errors:
npm ERR! install Couldn't read dependencies
npm ERR! Darwin 14.0.0
npm ERR! argv "node" "/usr/local/bin/npm" "install"
npm ERR! node v0.12.0
npm ERR! npm v2.6.0
npm ERR! path /Users/aston.haigh/package.json
npm ERR! code ENOPACKAGEJSON
npm ERR! errno -2
npm ERR! package.json ENOENT, open '/Users/aston.haigh/package.json'
npm ERR! package.json This is most likely not a problem with npm itself.
npm ERR! package.json npm can't find a package.json file in your current directory.
npm ERR! Please include the following file with any support request:
npm ERR! /Users/aston.haigh/Projects/astonhaigh.co.uk/npm-debug.log
Ive tried clearing the node cache, updating node and havent had any luck, any ideas?

Seem to fix the issue when i uninstalled node and then reinstall using homebrew. P.s really good tutorial: https://www.youtube.com/watch?v=FqMIyTH9wSg

npm config permission error

I am having permission problems with the npm config command. It seems that for some reason it is trying to change the owner of my ~/.npmrc file. When running npm config set color false, I get the following error:
npm ERR! Error: EPERM, chown '/home/bamboo/.npmrc'
npm ERR! { [Error: EPERM, chown '/home/bamboo/.npmrc'] errno: 50, code: 'EPERM', path: '/home/bamboo/.npmrc' }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.
npm ERR! System Linux 3.13.0-32-generic
npm ERR! command "/usr/bin/node" "/usr/bin/npm" "config" "set" "color" "false"
npm ERR! cwd /home/bamboo
npm ERR! node -v v0.10.33
npm ERR! npm -v 1.4.28
npm ERR! path /home/bamboo/.npmrc
npm ERR! code EPERM
npm ERR! errno 50
npm ERR! stack Error: EPERM, chown '/home/bamboo/.npmrc'
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR! /home/bamboo/npm-debug.log
npm ERR! not ok code 0
The file .npmrc has the right permissions and I can edit it manually but I need to do it from the npm config command since it is part of an automated build. I can't seem to find valuable information on that matter. I set the prefix to a directory I own and can install globally without any problem but can't run configure! I am running Ubuntu 14.04.
Does anybody have some ideas?

I had the same problem.
https://github.com/npm/npm/issues/7563
Turns out changing from sudo su to sudo su - when starting the bamboo agent process solved the problem.

Got this problem once.
The .npm directory does not have sufficient permissions. Run the following command:
sudo chown -R $(whoami) ~/.npm