• 概要
@angular/forms

ValidatorFn

interface
stable

A function that receives a control and synchronously returns a map of validation errors if present, otherwise null.

API

    
      interface ValidatorFn {  (control: AbstractControl<any, any, any>): ValidationErrors | null;}
    
    

ValidationErrors | null
@paramcontrolAbstractControl<any, any, any>
@returnsValidationErrors | null
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