Validator

Stable

Interface

Interface Overview

interface Validator {
validate(c: AbstractControl) : ValidationErrors|
null 
registerOnValidatorChange(fn: () => void) : void

}

Interface Description

An interface that can be implemented by classes that can act as validators.

Usage

@Directive({ selector: '[custom-validator]', providers: [{provide: NG_VALIDATORS, useExisting: CustomValidatorDirective, multi: true}] }) class CustomValidatorDirective implements Validator { validate(c: Control): {[key: string]: any} { return {"custom": true}; } }

Interface Details

validate(c: AbstractControl) : ValidationErrors|

null

registerOnValidatorChange(fn: () => void) : void

exported from forms/index, defined in forms/src/directives/validators.ts