How to fix npm WARN npm npm WARN npm New major version of npm available! in npm

See what versions you have and what's available:

# Current npm version
npm --version

# Current Node version (affects npm compatibility)
node --version

# See latest npm version
npm view npm version

Before upgrading npm, verify your Node.js supports it:

| npm Version | Minimum Node.js |
|-------------|----------------|
| npm 9 | Node 14+ |
| npm 10 | Node 18+ |
| npm 11 | Node 18+ |

If your Node.js is too old, upgrade Node first (using nvm or fnm).

Upgrade to the latest version:

npm install -g npm@latest

# Verify
npm --version

Windows: May need to run Command Prompt as Administrator.

Verify everything works:

# Clean install
rm -rf node_modules
npm install

# Run tests
npm test

# Build
npm run build

If issues occur, you can rollback:

npm install -g npm@9  # Specific version

If you want to hide the warning without upgrading:

npm config set update-notifier false

Or temporarily:

npm install --loglevel=error

Note: This hides all notifications including security warnings.

For team consistency, specify engine requirements:

{
  "engines": {
    "node": ">=18.0.0",
    "npm": ">=9.0.0"
  }
}

Enforce with .npmrc:

engine-strict=true

And use .nvmrc for Node version.