Managing the keyup input value and binding it to a variable in component.ts

Question

Managing the keyup input value and binding it to a variable in component.ts

Within my component.ts file, I currently have the following code setup:

@Component({
  selector: 'app-loop-back',
  template: `
    <input #box (keyup)="0">
    <p>{{box.value}}</p>
  `
})
export class LoopbackComponent implements OnInit{ 
    sampleString: string;

    contructor(){}

    ngOnInit(): void {}
}

The functionality in the HTML template allows for immediate display of whatever is typed into <input #box (keyup)="0"> using {{box.value}}. My query now is how to establish a binding between the input value {{box.value}} and sampleString: string; within my component.ts, enabling me to utilize it elsewhere.

angular typescript

Answer 1

Answer №1

To update the string value, you can attach the method to the change event in the input element.

Class file

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

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

       sampleString: string;

       updateBox(e) {
         this.sampleString = e.target.value; 
       }

    }

Template File

<input #box (keyup)="0" (input)="updateBox($event)">
  <p>{{box.value}}</p>
<p>This is the updated sampleString value: {{sampleString}} </p>

Answer 2

To update the string value, you can attach the method to the change event in the input element.

Class file

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

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

       sampleString: string;

       updateBox(e) {
         this.sampleString = e.target.value; 
       }

    }

Template File

<input #box (keyup)="0" (input)="updateBox($event)">
  <p>{{box.value}}</p>
<p>This is the updated sampleString value: {{sampleString}} </p>

Answer 3

Answer №2

To utilize angular's two-way binding feature, follow the example code snippet below:

@Component({
  selector: 'app-loop-back',
  template: `
    <input [(ngModel)]="sampleString">
    <p>{{sampleString}}</p>
  `
})
export class LoopbackComponent implements OnInit{ 
    sampleString: string;
   contructor(){}

    ngOnInit(): void {}
}

Answer 4

To utilize angular's two-way binding feature, follow the example code snippet below:

@Component({
  selector: 'app-loop-back',
  template: `
    <input [(ngModel)]="sampleString">
    <p>{{sampleString}}</p>
  `
})
export class LoopbackComponent implements OnInit{ 
    sampleString: string;
   contructor(){}

    ngOnInit(): void {}
}

Answer 5

Answer №3

If you prefer to use only HTML without 2-way binding, give this a try:

<input #box (keyup)="sampleString = $event.target.value">

Check out the working demo here

Answer 6

If you prefer to use only HTML without 2-way binding, give this a try:

<input #box (keyup)="sampleString = $event.target.value">

Check out the working demo here

Managing the keyup input value and binding it to a variable in component.ts

Answer №1

Answer №2

Answer №3

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