I am trying to use Create React App but getting an error that it requires Node 10 or higher. My node version is Node 8.10.0 and there's no way for me to update the Node version since it's a work machine. Is there any way to run an older version of Create React App to work with my older Node version?
I managed to run it. It seems like the last versions of the packages which support Node 8.x.x are 3.4.1 for create-react-app and 3.1.1 for react-scripts. What I did:
npm uninstall -g create-react-app
npm install -g create-react-app#3.4.1
create-react-app my-app --scripts-version 3.1.1
But it's better to update your Node version to the actual (or LTS at least).
From my understanding you can add the flag --scripts-version to your npx create-react-app command. So for example if you wanted to run react version 15.6 you would run something like:
npx create-react-app appname --scripts-version 1.0.14
You can reference the react-script repo as well as the NPM Package for more information on which version of the script you would want to run. Hopefully this helped! If not please let me know and I'm more than willing to try and look more into it.
Edit:
Forgot to mention that you need to make sure to change the versions of react and react dom within your package.json after. So after installing you would run:
npm i react#15.6
npm i react-dom#15.6
I'm very new to React Native, barely two weeks into it. I've installed node.js (ver 10.15.0), I've also installed yarn and downloaded WebStorm.
The problem is that I can't run a simple project created by WebStorm, it throws an error
Command start unrecognized. Make sure that you have run npm install and that you are inside a react-native project.
I've cd into my WebStorm projects folder and run npm install in command prompt countless times but it's still throwing the error. Some online suggestions said I should set my path correctly, but I don't really know how to go about it.
Any help will be appreciated.
You should know The best IDE for react native is VSCode (visual studio code) and don't create project with IDE (you should use commands for create project. just use IDE for manage codes)
use CMD or PowerShell (Recommended) for commands
Create a folder for your project and in the project directory run this commands :
npm install -g expo-cli
expo init Yourprojectname
cd Yourprojectname
npm start
For run android project
react-native run-android
For run android project
react-native run-ios
Also its better to read this tutorial : https://facebook.github.io/react-native/docs/getting-started
What are the steps to run a react native project in android studio after eject from create react native. I didn't find a helpful step by step description online for this. I am pretty new to android development, facing different problems related to gradle versions and other stuffs in android. Do I need to run it from android studio, or just need to run the command npm run android
Install React Native using Mac OS
Please check React Native Document before start.
https://facebook.github.io/react-native/docs/getting-started.html
If you don’t have install brew in your computer then must hit that command line.
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Then Follow the Command step to step
brew install node
Once Complete node step up then you must Create React Native Directory in your Computer to do this follow the Following Steps:
Open Terminal and hit…
cd
cd Documents
mkdir react-native
cd react-native/
Now You create your React Native Directory now once it’s done.
Node comes with npm, which lets you install the React Native command line interface.
Run the following command in a Terminal:
npm i react-native-cli - g
it need some time to complete install once it’s done make sure you check it’s npm version to do that hit the following command line.
npm -v
So you get your version code if you are using 4.6.1 above then maybe you are using some of the problems so remove above version and use this of a version using this command line.
npm I -g npm#4.6.1
Hit enter and you start with that npm version. So it’s Done now Follow the React Native Document if you are using Android and iOS then you can follow the Steps but skip installation node step because we set up all those steps and once you are using Setup Android or Xcode in your pc Follow the Command to run React Native app.
Using your React Native Folder that you create in a directory like this
cd
cd Documents
mkdir react-native
cd react-native/
react-native init HelloWorld
Here we are Create our HelloWorld Programme Using Android Studio and React Native.
Once you have ejected you need to run below commands
exp run
react-native run-android
Make sure exp is installed. exp run will serve the js bundle locally which will be accessed when your android app runs via react-native run-android command on simulator or connected device.
I am new to OpenCV and node js, trying to learn OpenCV in node js.
I came across opencv4nodejs which I found best for learning.
I have followed all steps to install OpenCV and setting environment variables for OpenCV and done npm install opencv4nodejs also. able to run Quick start code given but when I try to run example machineLearningOCR.js from examples folder I get error Error: Cannot find module '../build/Release/opencv4nodejs'
I run command node machineLearningOCR.js from cmd but getting error mentioned above on line const cv = require('../');
How to run examples given in opencv4nodejs?
If you cloned the repository and want to use the examples directly from the examples folder then you have to npm install in the root directory first to build the module.
Optionally you can npm install opencv4nodejs in any project directory, copy the examples into that directory and replace const cv = require('../'); with const cv = require('opencv4nodejs');.
You can also directly submit an issue here: https://github.com/justadudewhohacks/opencv4nodejs/issues
I had the same problem and I did solve the issue with the following steps.
First all of. I checked the npm version, for this case I recommend you updated or pass your software resources at the next version.
NodeJs 14.16.0
NodeJs version: 14.16.0. You can verify the version with this command if you had another NodeJs version installed
node --version
Npm version: 6.4.11 You need verify if you had this version installed only you will able to validate this if you have NodeJs but if you didn't have node you can install the version I recommend you
npm --version
After you set the NodeJs and npm versions you need to verify the following things
Have visual studio 2015 or latest with the development for desktop component
Have cmake program installed
Have git bash
Have Java or the language you will to work
Have the environment variables for the above programs I mentioned
Then you can try again to install open Cv
You need to reopen another or new terminal and then you will execute this command
npm install --save openc4nodejs
And then
npm install -g openc4nodejs
After than or before don't forget to install appium I recommend you 1.19.1 version
You can verify if you have appium with opencv with open Cv doctor you can run appium-doctor and check if the Open cv component are present.
For to install appium doctor you can run this command, npm install -g appium-doctor
I hope this answers will be helpful for you
Autor: Eder Carbonero
I'm working with Yarn v0.16.1. If I understand correctly (according to the documentation), yarn global add <package> should be the equivalent of npm install -g <package>. However, when I run the example in the docs (with create-react-app), the command runs successfully but create-react-app is then not available from the command line. Here's the output:
$ yarn global add create-react-app
$ yarn global v0.16.1
[1/4] 🔍 Resolving packages...
[2/4] 🚚 Fetching packages...
[3/4] 🔗 Linking dependencies...
[4/4] 📃 Building fresh packages...
success Installed create-react-app#0.6.0 with binaries:
- create-react-app
✨ Done in 3.22s.
$ create-react-app --help
-bash: create-react-app: command not found
Doing a global install with npm has the expected result, and everything works. What am I missing with yarn?
You should add export PATH="$PATH:$(yarn global bin)" to your ~/.bash_profile or whatever you use. It would solve the issue.
Depending on how you installed it, Yarn's global folder varies for some reason. You can follow this issue here.
Update Dec 2018
Just updating the path didn't work for me. I had to also set the yarn prefix.
Ubuntu 18.04.1 LTS (bionic)
yarn 1.12.3
npm v3.5.2
node v8.10.0
zsh 5.4.2
Steps
Confirm your global bin path
yarn global bin
I got: /home/username/.yarn/bin
set yarn prefix:
make sure your yarn prefix is the parent directory of your bin directory. You can confirm by running
yarn config get prefix
when I ran this, my prefix was empty, so I set it:
yarn config set prefix ~/.yarn
add the following to ~/.bash_profile or ~/.bashrc
export PATH="$PATH:`yarn global bin`"
for zsh users, be sure to add this line to ~/.zshrc
restart your shell or start a new one
bash -l or zsh
In my case yarn global bin wasn't working.
Try a brew reinstall yarn if that's how you installed yarn
👍🏻
Ran into this issue but on a Windows system. All I had to do was add the yarn global bin to the PATH variable.
setx path "%path%;c:\users\YOURUSERNAME\appdata\local\yarn\bin"
Remember to change YOURUSERNAME to your account username.
You can check where your global bin is by running
yarn global bin
And please don't forget to restart the CMD window that you're working on.
Happy coding!
! WARNING !
When executing the command that %path%; in front of your yarn directory is very important. If you don't type it you will definitely replace all your system environment variables.
Option 2
Safer option would be would be to just go to System Properties > Advanced > Environment Variables > select PATH the click Edit > then append and not replace with ;c:\users\YOURUSERNAME\appdata\local\yarn\bin
For macOS, you just need one step,
export PATH=~/.yarn/bin:$PATH
To reinstall run below.
brew install -g yarn
// Note:(updating homebrew) for Mac users.
brew reinstall yarn
// (if yarn is still not found)
Here's the process I used on Mac OSX El Capitan.
Try to install yarn (I used the Curl command) if you have it already. This will bring up if its already installed and will give you the current directory where it exists.
Like this:
curl -o- -L https://yarnpkg.com/install.sh | bash
It will display something like this:
Installing Yarn!
> /Users/{Your Username}/.yarn already exists, possibly from a past Yarn install.
> Remove it (rm -rf /Users/{Your Username}/.yarn) and run this script again.
Do not remove it. Move on to step 2.
Copy the directory listed above. Open your profile. I'm using zsh. So mine was ~/.zshrc. You can find yours and more info here.
Copy the following (replacing your directory and username details as necessary, the one you got from the installation error message).
alias yarn="/Users/{Your Username}/.yarn/bin/yarn"
Try to run yarn version to check if its working. If it is, you should see a version number displayed in your terminal.
That's it, and what worked for me.
AndrewD gave a great answer, but for those on Windows it's a bit different, especially step 3.
Please do not use the command setx as #Thapedict said.
It will remove all your previous paths you had and replace it with only the given directory.
If you want to use setx, I think there might be a flag to make it append the existing path variables, but I don't know which one. Using only setx will not append to it.
I would just do System Properties > Advanced > Environment Variables > Edit Path > New > c:\users\YOURUSERNAME\appdata\local\yarn\bin
to make sure you don't remove your previous variables.
export PATH="$PATH:$(yarn global bin)"
On Ubuntu, I fixed by installing the package like this:
sudo yarn global add <package> --prefix /usr/local
When switching from bash to zsh, I got the same error, it worked for me:
in your .zshrc
# NVM Stuff
export NVM_DIR="$HOME/.nvm"
. "$(brew --prefix nvm)/nvm.sh"
# YVM Stuff
export YVM_DIR="$HOME/.yvm"
. "$(brew --prefix yvm)/yvm.sh"
As I understand it, my mistake arose due to the lack of access to version managers
I faced a similar issue on Windows after installing Yarn then Vue Cli.
Packages were installed but not accessible.
The problem was that the directory where yarn packages are installed is not in PATH.
The default installation directory for Yarn packages in my case was
C:\Users\USERNAME\AppData\Local\Yarn
So make sure to add this directory to path.
Putting this answer so that hopefully it can come in google and help others.
expo command not found after using
yarn global add expo-cli don't work in ubuntu 20.04
It's no longer necessary to modify your path for yarn
Newer versions of yarn include yarn create and yarn exec
In the case of create-react-app you can run yarn create react-app see this blog post https://classic.yarnpkg.com/blog/2017/05/12/introducing-yarn/
To run a non-creating package like serve, you can still run it without modifying your path! After installing it with yarn global add serve try this: yarn exec serve