One of your dependencies, babel-preset-react-app, is importing the
“@babel/plugin-proposal-private-property-in-object” package without
declaring it in its dependencies. This is currently working because
“@babel/plugin-proposal-private-property-in-object” is already in your
node_modules folder for unrelated reasons, but it may break at any time.
babel-preset-react-app is part of the create-react-app project, which
is not maintianed anymore. It is thus unlikely that this bug will
ever be fixed. Add “@babel/plugin-proposal-private-property-in-object” to
your devDependencies to work around this error. This will make this message
go away.
The warning message you’re seeing indicates that babel-preset-react-app relies on the @babel/plugin-proposal-private-property-in-object package but doesn’t explicitly declare it as a dependency. This is a problem because it violates dependency best practices, and the build may break in the future if this package is removed from your node_modules folder.
Since create-react-app (CRA) is no longer actively maintained, the best solution is to add the missing package to your devDependencies manually. Here’s how you can fix it:
Steps to Fix the Warning
- Open your terminal and run the following command:
npm install --save-dev @babel/plugin-proposal-private-property-in-object
or
yarn add --dev @babel/plugin-proposal-private-property-in-object
This will explicitly add the missing package to your devDependencies in the package.json file.
Verify that the warning is gone by running your application again:
npm startLong-Term Solution
Since create-react-app is no longer maintained, you might want to consider migrating to a more actively supported tool or framework, such as:
- Vite: A modern build tool with fast development and build speeds.
- Next.js: A full-stack React framework with SSR and SSG capabilities.
- Custom Webpack Config: If you prefer to maintain more control over your build process.
Migrating away from create-react-app can save you from future compatibility and maintenance issues.
Let me know if you need help with the migration!
khaledyou87@gmail.com
