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Function: defined()

defined<T>(errorMessage): Validator<T | null | undefined, T, string>

Defined in: validation/validators/index.ts:438

Validates value is not null or undefined.

Type Parameters​

T​

T

Parameters​

errorMessage​

string

Custom error message

Returns​

Validator<T | null | undefined, T, string>

Validator that checks for defined value

Example​

defined('Value required')(42) // => Valid(42)
defined('Value required')(null) // => Invalid(['Value required'])
defined('Value required')(undefined) // => Invalid(['Value required'])