Angular 6 add input on enter key
You can approach this using Reactive Forms FormArray. You would attach an (keyup)
or (keyup.enter)
handler to the <input />
. Within the handler for this keyup
event, we push a new FormControl
to a FormArray
. This example uses FormBuilder to generate a FormGroup that contains a FormArray with a key of things
. We use the push method of FormArray
to add a new FormControl
/AbstractControl
within the handler for keyup.
Component:
import { Component } from '@angular/core';
import { FormBuilder, FormGroup, FormArray } from '@angular/forms';
@Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: [ './app.component.css' ]
})
export class AppComponent {
name = 'Angular';
myForm: FormGroup;
constructor(private fb: FormBuilder) {
this.createForm();
}
onEnter() {
this.addThing();
}
get things() {
return this.myForm.get('things') as FormArray;
}
private createForm() {
this.myForm = this.fb.group({
things: this.fb.array([
// create an initial item
this.fb.control('')
])
});
}
private addThing() {
this.things.push(this.fb.control(''));
}
}
Template:
<form [formGroup]="myForm">
<div formArrayName="things">
<div *ngFor="let thing of things.controls; let i=index">
<label [for]="'input' + i">Thing {{i}}:</label>
<input type="text" [formControlName]="i" [name]="'input' + i" [id]="'input' + i" (keyup.enter)="onEnter()" />
</div>
</div>
</form>
At a very basic level you can loop through each in the form array using the controls property of the respective FormArray
element and the value using the value property:
<ul>
<li *ngFor="let thing of things.controls">{{thing.value}}</li>
</ul>
Here is a StackBlitz demonstrating the functionality.
I see a lot people using either keyup.enter or keydown.enter, but what is most appropriate is keypress.enter
<input type="text" [(ngModel)]="reference_num" class="form-control" placeholder="Type Reference number" name="reference_num" (keypress.enter)="search()">
You can easily use keydown event in angular 6, angular 7, angular 8 and angular 9 application.
When user will key up on input box field then trigger onKeyDownEvent() of angular component. You can use (keydown.enter) attribute as to call function. Bellow logic code:
.html
<input type="search" (keydown.enter)="onKeyDownEvent($event)" />
.ts
@Component({
selector: 'my-app',
templateUrl: './my.component.html',
styleUrls: ['./my.component.css']
})
export class MyComponent {
constructor(private router: Router,
private route: ActivatedRoute) { }
onKeyDownEvent(event: any) {
this.router.navigate(['search-result'], { relativeTo: this.route });
...logic
}
}
Be aware that we need to navigate to other route programmatically, in the .ts file, NOT in html file with the routerLink="/search-result" . We need to inject Router and ActivatedRoute classes as to navigate from current route to the /search-result route.
Controller
Declare an array 'inputs' and initialises it with a value of 1.
inputs = [1];
Create a function addInput().
addInput() {
this.inputs.push(1);
}
HTML
<div id="testo" class="offset-1 text-center" *ngFor="let more of inputs">
<input type="text" class="col-8 text-center" (keyup.enter)="addInput()">
</div>
In your template you'll be calling the addInput() function every time you hit enter (keyup.enter). The function pushes a new value into the array, whose length increases by 1 and that in turn creates a new input field.