Every time I execute npm start in my React project, an error pops up:
[email protected] start C:\Users\AyaLe\Desktop\React\myapp react-scripts start
It seems there might be a problem with the project's dependency tree. It does not appear to be a bug in Create React App, but rather something that needs fixing locally.
The Create React App's react-scripts package has a dependency requirement:
"webpack": "4.19.1"
Do not attempt manual installation: your package manager handles it automatically. However, a different version of webpack was detected higher up in the tree:
C:\Users\AyaLe\node_modules\webpack (version: 3.10.0)
Manually installing incompatible versions can lead to challenging-to-debug issues.
If you choose to ignore this check, add SKIP_PREFLIGHT_CHECK=true to an .env file in your project. This will permanently disable this message, but other issues may arise.
To resolve the dependency tree issue, follow the steps below in the specified order:
- Delete package-lock.json (not package.json!) and/or yarn.lock in your project folder.
- Delete node_modules in your project folder.
- Remove "webpack" from dependencies and/or devDependencies in the package.json file in your project folder.
- Run npm install or yarn, depending on your choice of package manager.
In most cases, these steps should rectify the problem. If they do not, consider taking the following actions:
If you used npm, install yarn (http://yarnpkg.com/) and repeat the above steps using it instead. Switching to yarn could help as npm experiences known issues with package hoisting which may be resolved in future versions.
Check if C:\Users\AyaLe\node_modules\webpack is located outside your project directory. You might have accidentally installed something in your home folder, for example.
Try running npm ls webpack in your project folder. This will show you which other package (other than the expected react-scripts) installed webpack.
If none of these solutions work, add SKIP_PREFLIGHT_CHECK=true to an .env file in your project. This will permanently disable the preflight check in case you want to proceed anyway.
P.S. We understand that this message is lengthy, but please read through the provided steps :-) We trust they will prove helpful!
npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! [email protected] start:
react-scripts startnpm 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.npm ERR! A complete log of this run can be found in: npm ERR!
C:\Users\AyaLe\AppData\Roaming\npm-cache_logs\2018-12-02T10_15_24_630Z-debug.log
Moreover, each attempt to install webpack-cli results in another error prompt.