CODEWITHSUNDEEP
reactjscreate-react-app
Java slayer
Java slayer

Reputation: 11

Error running React App "about the webpack"

I'm using create-react-app. When I run npm start, I get the error below.

I've tried all the steps given by the terminal (see below). It just doesn't work. I have also tried to uninstall and install webpack, but no luck so far. How can I fix this?

There might be a problem with the project dependency tree. It is
likely not a bug in Create React App, but something you need to fix
locally. The react-scripts package provided by Create React App requires a dependency:

 "webpack": "4.19.1"
   Don't try to install it manually: your package manager does it    automatically. However, a different version of webpack was detected

higher up in the tree:

 /Users/seertech/node_modules/webpack (version: 4.23.1)
   Manually installing incompatible versions is known to cause    hard-to-debug issues.
   If prefer to ignore this check, add SKIP_PREFLIGHT_CHECK=true to an    .env file in your project. That will permanently disable this

message but you might encounter other issues. To fix the dependency tree, try following the steps below in the exact order:

 1. Delete package-lock.json (not package.json!) and/or yarn.lock in your project folder.
 2. Delete node_modules in your project folder.
 3. Remove "webpack" from dependencies and/or devDependencies in the package.json file in your project folder.
 4. Run npm install or yarn, depending on the package manager you use.
   In most cases, this should be enough to fix the problem. If this has    not helped, there are a few other things you can try:

 5. If you used npm, install yarn (http://yarnpkg.com/) and repeat the above steps with it instead.
    This may help because npm has known issues with package hoisting which may get resolved in future versions.

 6. Check if /Users/seertech/node_modules/webpack is outside your project directory.
    For example, you might have accidentally installed something in your home folder.

 7. Try running npm ls webpack in your project folder.
    This will tell you which other package (apart from the expected react-scripts) installed webpack.
   If nothing else helps, add SKIP_PREFLIGHT_CHECK=true to an .env file    in your project. That would permanently disable this preflight

check in case you want to proceed anyway. P.S. We know this message is long but please read the steps above :-) We hope you find them helpful! npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! [email protected] start: react-scripts start npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the [email protected] start script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

Upvotes: 0

Views: 2090

Answers (1)

RaneWrites
RaneWrites

Reputation: 278

This is because an NPM package was installed in a folder above this one, likely in error. To remedy, start at the project folder and cd ../ into the above folder, do ls. If you see a node_modules folder that shouldn't be there, delete it. If not, cd ../ again and ls again. Repeat until you find the offending node_modules and delete it.

Upvotes: 1

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