CODEWITHSUNDEEP
htmlangularevents
Konrad Viltersten
Konrad Viltersten

Reputation: 39160

How to prevent tab event in Angular?

I want to use tab key to perform some logic but not actually change the focus. According to this answer's comments I can use false in my markup or preventDefault() in the method. I have both like this.

onKey(event: KeyboardEvent) { 
  event.preventDefault();
  if(event.key = "Tab") { this.update.emit(this.config); }
}

<input #input
   title="{{config|json}}"
   value="{{config.value}}"
   (keyup)="onKey($event)"
   (keydown.Tab)="onKey($event);false;">

Still, it gets an extra jump when I hit tab key. When I tried the very same logic but based on other keys (e.g. "a" or "enter"), the behavior is as expected, so I conclude that the logic is correct. For some reason, by tab is unruly and propagates the event as if I want to tab twice.

Am I handling tab key up incorrectly? Not sure what to google for other than what I already have.

Upvotes: 7

Views: 9538

Answers (2)

Dmitry Grinko
Dmitry Grinko

Reputation: 15214

Try to use this code:

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

@HostListener('document:keydown.tab', ['$event'])
onKeydownHandler(event: KeyboardEvent) {
    event.preventDefault();
}

Upvotes: 3

jcuypers
jcuypers

Reputation: 1794

Extract from the stackblitz : https://stackblitz.com/edit/angular-gbuwma?embed=1&file=src/app/app.component.ts

ts

import { Component, ViewChild, ElementRef,ChangeDetectorRef } from '@angular/core';

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

  constructor(private changeDetector: ChangeDetectorRef) { }


  @ViewChild("input2") input2: ElementRef;

  onKey(event: KeyboardEvent) {
    event.preventDefault();
    if (event.key === "Tab") {
        console.log('ole... tab');
        this.input2.nativeElement.value = "aha";
        this.changeDetector.detectChanges();
        this.input2.nativeElement.focus();
    }

  }

}

html

<input #input
   title=""
   value=""
   (keydown.Tab)="onKey($event);false;">
 - - - 
   <input #input2
   title=""
   value=""
   (keydown.Tab)="onKey($event);false;">

Upvotes: 3

Related Questions