angular-cn/aio/content/examples/form-validation/src/app/shared/identity-revealed.directive.ts
George Kalpakas 8aa29438ac refactor(docs-infra): fix docs examples for tslint rules related to object properties (#38143)
This commit updates the docs examples to be compatible with the
`no-string-literal`, `object-literal-key-quotes` and
`object-literal-shorthand` tslint rules.

This is in preparation of updating the docs examples `tslint.json` to
match the one generated for new Angular CLI apps in a future commit.

PR Close #38143
2020-07-31 11:00:06 -07:00

26 lines
1.0 KiB
TypeScript

// #docregion
import { Directive } from '@angular/core';
import { AbstractControl, FormGroup, NG_VALIDATORS, ValidationErrors, Validator, ValidatorFn } from '@angular/forms';
// #docregion cross-validation-validator
/** A hero's name can't match the hero's alter ego */
export const identityRevealedValidator: ValidatorFn = (control: FormGroup): ValidationErrors | null => {
const name = control.get('name');
const alterEgo = control.get('alterEgo');
return name && alterEgo && name.value === alterEgo.value ? { identityRevealed: true } : null;
};
// #enddocregion cross-validation-validator
// #docregion cross-validation-directive
@Directive({
selector: '[appIdentityRevealed]',
providers: [{ provide: NG_VALIDATORS, useExisting: IdentityRevealedValidatorDirective, multi: true }]
})
export class IdentityRevealedValidatorDirective implements Validator {
validate(control: AbstractControl): ValidationErrors {
return identityRevealedValidator(control);
}
}
// #enddocregion cross-validation-directive