Create React App not working

问题:

Help! I have no idea what is going on here, create react app is not working I have also tried reinstalling and yet to no avail, please help!

Npm version: 5.4.2 Node version: 8.70

Tried the npm install --save --save-exact --loglevel error react react-dom react-scripts

回答1:

Please try this:

npm cache clean --force

回答2:

In my case, "create-react-app" was not installed. to install run this command

 npm install -g create-react-app

Once installation successful, try running

npx create-react-app hello-world

If this works for you. Great else comment what worked for you,

回答3:

It sets up your development environment so that you can use the latest JavaScript features, provides a nice developer experience, and optimizes your app for production.

You’ll need to have Node >= 8.10 and npm >= 5.6 on your machine. To create a project, run:

npx create-react-app my-app

cd my-app

npm start

Note: npx on the first line is not a typo — it’s a package runner tool that comes with npm 5.2+.

Create react app provides more information regarding this.

It may be the problem of cache also, so can also try:

npm cache clean --force

回答4:

Make sure you are not running any antivirus, stop/pause all antivirus or protection software.

You can also try

use create-react-app projectname --save
or create-react-app projectname --save-exact and start again

OR

as the error suggests, you should use a newer version of node. You are using 8.9.4, you should probably use 8.12.0 LTS.

回答5:

I had the same problem, and I solved it by:
1. update the npm version (npm install npm@latest -g)
2. clear the cache (npm cache clean --force)
3. create the react project (npx create-react-app todo)
(create-react-app was already installed)

回答6:

The problem on my machine was caused by yarn. I am windows 10 and after uninstalling yarn using npm uninstall -g yarn, my script run correctly. So

1. Open terminal and type: npm uninstall -g yarn
2. Once done, close terminal and open new one
3. type create-react-app (app name) and this should create your app :)

Please note that the above steps assume that you already have node and react-cli installed on your machine.

回答7:

on Ubuntu 18.04

sudo npm cache clean -f
sudo npm install -g n
sudo n stable

回答8:

What I did, is going to

C:\Users\mycomputerName\AppData\Roaming\npm\

I changed the name of this file

create-react-app.ps1

to

create-react-appOld.ps1

or you can delete it, then it worked fine

回答9:

Tried all the above methods but no luck:(

Step1 : Reinstalled Node js

Step2 : Check whether environment variables has been created. if not create one for nodejs,npm and composer

Step3: Also add "C:\Windows\System32" to the global PATH environment variable.

Step4: Then use "npx create-react-app my-app" to create react project

Step5: Run the commmand : cd my-app and npm start

Step6: It will work

回答10:

I also experienced the same problem and SOLVED IT. This is what I did.

1. Restart your machine(computer)
2. Deactivate your anti-virus. I chose the "permanently" option
3. Open the terminal and run the "create-react-app" command again, It will definitely do the trick.
4. Activate your anti-virus
5. And get working :-)