How to fix npm ERR! code EINVALIDSEMVER in npm

1.0.0           # Basic version
1.0.0-alpha     # Prerelease
1.0.0-beta.1    # Numbered prerelease
1.0.0-rc.1      # Release candidate
1.0.0+build.123 # Build metadata

// WRONG
"1.0"           // Missing patch
"v1.0.0"        // No "v" prefix
"1.0.0.0"       // Too many parts
"01.0.0"        // Leading zero

// CORRECT
"1.0.0"

"dependencies": {
  "pkg": "^1.0.0",    // Compatible
  "pkg": "~1.0.0",    // Approximately
  "pkg": ">=1.0.0",   // Greater/equal
  "pkg": "1.0.0 - 2.0.0", // Range
  "pkg": "1.x || 2.x"     // Or
}

# Set valid version
npm version 1.0.0

# Increment properly
npm version patch  # 1.0.0 -> 1.0.1
npm version minor  # 1.0.1 -> 1.1.0
npm version major  # 1.1.0 -> 2.0.0

# Using semver package
npx semver 1.0.0  # Valid - returns 1.0.0
npx semver v1.0   # Invalid - returns nothing

# Check range
npx semver -r "^1.0.0" 1.0.5  # Returns 1.0.5 if in range

# Show dependency versions
npm ls

# Update to valid versions
npm update

# Check for outdated
npm outdated