typeValidity

Enforces that the type property is valid.

✅ This rule is included in the package-json logical presets.

This rule checks that the type property is a string with a value of either commonjs or module.

Examples

❌ Incorrect

{
  "type": "esm"
}

✅ Correct

{
  "type": "module"
}

When Not To Use It

If you don’t need compliance with npm’s type field specification, you can disable this rule. For example, if you use a different package manager that treats the field differently, this rule may not be correct for you.

Related Rules

• typePresence - Enforces that the type property is present.

Further Reading

• npm: package.json > type

Equivalents in Other Linters

• ESLint: package-json/valid-type