How to trigger Form Validators in angular2?

Question

I have created angular2 web application .in that i have implemented a custom validator with form builder it will work on submit but i need to trigger validation dynamically in other form control value change please any one give suggestion to achieve this

thank you

Does this answer your question? [How to trigger Form Validators in Angular2](https://stackoverflow.com/questions/32260082/how-to-trigger-form-validators-in-angular2) — fracz, Mar 15 '20 at 14:49

score 4 · Accepted Answer · 2017-04-13T05:34:41.980

4

try this

  this.RegisterForm1.controls["form control name"].updateValueAndValidity();

i think may be help you

edited Apr 13 '17 at 05:34

answered Apr 13 '17 at 05:30

where i add this – Apr 13 '17 at 05:31
1

in your ionchange function – Apr 13 '17 at 05:32

Pardeep Jain · Answer 2 · 2017-04-13T05:41:05.750

Here is the example of form with custom validation

formInitilization() {
      this.loginForm = this._fb.group({
        email: ['', [Validators.required ,this.emailValidation]]
      });
  }

  emailValidation(control?:FormControl){ 
  let val=control.value.trim();
  let emailp:any=/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
      if(!emailp.test(val))
          return {    isInvalidEmail:true };
      return null;
  }

<input type="text" formControlName="email" autofocus='true'>
<span *ngIf='!loginForm.controls["email"].valid && loginForm.controls["email"].dirty' > 
  Error message
</span>

How to trigger Form Validators in angular2?

2 Answers2

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