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How to check whether a form or a control is touched or not in Angular 10 ?

  • Last Updated : 03 Jun, 2021

In this article, we are going to check whether a form is touched or not in Angular 10. The touched property is used to report that the control or the form is touched or not.

Syntax:

form.touched

Return Value:

  • boolean: the boolean value to check whether a form is touched or not.

NgModule: Module used by the touched property is:

  • FormsModule

 



Approach: 

  • Create the Angular app to be used.
  • In app.component.html make a form using ngForm directive.
  • In app.component.ts get the information using the touched property.
  • Serve the angular app using ng serve to see the output.

Example:

app.component.ts




import { Component } from '@angular/core';
import { FormGroup, FormControl, FormArray, 
        Validators } from '@angular/forms'
  
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html'
})
  
export class AppComponent {
  form = new FormGroup({
    name: new FormControl(
    ),
    rollno: new FormControl() 
  });
  
  get name(): any {
    return this.form.get('name');
  }
  
  onSubmit(): void {
    console.log("Form is touched : ",this.form.touched);
  }
}

app.component.html




<form [formGroup]="form" (ngSubmit)="onSubmit()">
  <input formControlName="name" placeholder="Name">
  <br>
    
  <button type='submit'>Submit</button>
  <br><br>
</form>

Output:

Reference: https://angular.io/api/forms/AbstractControlDirective#touched




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