newNativeNonConstructors

Disallows using new with global non-constructor functions like Symbol and BigInt.

✅ This rule is included in the ts untyped preset.

The global Symbol and BigInt functions are not constructors and will throw a TypeError when called with the new keyword. These functions should be called directly without new to create their respective values.

Examples

❌ Incorrect

const symbol = new Symbol("description");

const bigNumber = new BigInt(42);

function create() {
  return new BigInt(100);
}

✅ Correct

const symbol = Symbol("description");

const bigNumber = BigInt(42);

function create() {
  return BigInt(100);
}

Options

This rule is not configurable.

When Not To Use It

If you have globally overridden BigInt and/or Symbol with classes that are meant to be used as constructors, you may want to disable this rule. However, overriding these names is generally not recommended as it can cause confusion with the global functions.

Further Reading

• MDN documentation on BigInt
• MDN documentation on Symbol

Equivalents in Other Linters

• Biome: noInvalidBuiltinInstantiation
• Deno: no-new-symbol
• ESLint: no-new-native-nonconstructor
• Oxlint: eslint/no-new-native-nonconstructor