How to fix npm ERR! code ERESOLVE in npm

npm shows detailed conflict info:

npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! Found: [email protected]
npm ERR! node_modules/react
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer react@"^17.0.0" from [email protected]

This shows exactly what conflicts.

Use npm 6 style dependency resolution:

npm install --legacy-peer-deps

This ignores peer dependency conflicts like npm 6 did.

Force installation (use cautiously):

npm install --force

⚠️ This may cause runtime issues if dependencies truly are incompatible.

Find compatible versions:

# Check for updates
npm outdated

# Update specific package
npm update package-name

# Check peer dependencies
npm view some-package peerDependencies

Force specific versions:

{
  "overrides": {
    "react": "18.2.0"
  }
}

This forces all packages to use your specified version.

If a package causes persistent issues:

1. Check for newer version
2. Look for fork with updated deps
3. Consider alternative package
4. Open issue with package maintainer