@modular-forms/react/dist/source/validation/value.js

The modular and type-safe form library for React

/**
 * Creates a validation function that checks the value of an input for equality.
 *
 * @param requirement The value to be checked.
 * @param error The error message.
 *
 * @returns A validation function.
 */
export function value(requirement, error) {
    return (value) => (value || value === 0) && value !== requirement ? error : '';
}