n4s/src/rules/general/isNaN.ts

typed schema validation version of enforce

import { toNumber } from 'vest-utils';

import { RuleInstance } from '../../utils/RuleInstance';

export interface NaNRuleInstance extends RuleInstance<number | string, [any]> {}

// Validates that a value is NaN (Not a Number)
export function isNaN(value: number | string): boolean {
  return Number.isNaN(toNumber(value).unwrapOr(NaN));
}