Angular 14 Getters & Setters Two Way Data Binding Form Input Validation Tutorial For Beginners

Welcome folks today in this blog post we will be using the validating the input field data using two way data binding & getters and setters method using typescript in browser. All the full source code of the application is shown below.

Get Started

In order to get started you need to make a new angular project using the below command as shown below

ng new sampleproject

cd sampleproject

And after that you will see the below directory structure of the angular app as shown below

And now we need to go to app.component.html file and copy paste the below html code here we will have the input field where we will be assigning the ngModel directive as shown below

app.component.html

<p>The entered name is: {{name}}</p>
<input type="text" [(ngModel)]="validateName">

1 2	<p>The entered name is: {{name}}</p> <input type="text" [(ngModel)]="validateName">

And now we need to define the validateName function inside the app.component.ts file as shown below

app.component.ts

import {Component } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent  {
  
  title = "sharing data"

  name:any

  get validateName():string{
    return this.name
  }

  set validateName(value:any){
    this.name = value
    if(this.name == "Kane"){
      alert("Name already taken")
    }
  }

}

import {Component } from '@angular/core';

@Component({

selector: 'app-root',

templateUrl: './app.component.html',

styleUrls: ['./app.component.css']

})

export class AppComponent {

title = "sharing data"

name:any

get validateName():string{

return this.name

}

set validateName(value:any){

this.name = value

if(this.name == "Kane"){

alert("Name already taken")

}

As you can see we have the get and the set methods where we are returning the value of the name variable and then inside the set method we are passing the entered value and then we are checking if the value is equal to kane and then we are showing the alert statement as shown below