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How to check textbox is null in angular 5

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How to check textbox is null in angular 5

nithi mano

8yAsked May 23, 2018, 8:42 AM2kAngular

How to check textbox is null in angular 5

1 Reply

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Manav Pandya8y ago
Hello

For that you can check it length or another way as given below

Online link :

https://check-textbox-is-empty-or-not-angular6.stackblitz.io/

Code :

.ts file :
import { Component } from '@angular/core';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
  txtValue:string = null;
  message : string;

  onTextChange(value)
  {
    this.txtValue = value;
    if(this.txtValue == '')
    {
      this.message="Textbox is empty !!!";
    }

  }
}
html file :
How To Check That Textbox is Null or Not : MAnav Pandya


















Enter any value : "text"  [(ngModel)]="txtValue" (ngModelChange)="onTextChange($event)" />

{{txtValue}} {{message}}

Thanks

0