Variable nanAssertion`Const`

nanAssertion: AssertionStandardSchemaSync<readonly ["to be NaN"], ZodNaN, never> = ...

Asserts that the subject is NaN (Not a Number).

Example

expect(NaN, 'to be NaN'); // passes
expect(42, 'to be NaN'); // fails
expect('not a number', 'to be NaN'); // fails