Skip to main content

Function: negative()

negative(errorMessage?): Validator<number, number, string>

Defined in: validation/validators/index.ts:270

Validates number is negative (< 0).

Parameters​

errorMessage?​

string

Custom error message (optional)

Returns​

Validator<number, number, string>

Validator that checks negative value

Example​

negative()(-5) // => Valid(-5)
negative()(0) // => Invalid(['Must be negative'])
negative()(1) // => Invalid(['Must be negative'])