faisalahmedador

 <div class="form-group">
    <input id="password" capsLockDetect (capsLockOn)="capsLock = $event" type="password">
    <small  class="form-text text-muted">Password</small >
    <strong class="capslock-warning" title="Caps-lock is ON!" *ngIf="capsLock === 1">
     Caps-lock is ON!
    </strong>
  </div>

faisalahmedador

import {Directive, OnInit, HostListener, Output, EventEmitter} from "@angular/core";

@Directive({
    selector: '[capsLockDetect]'
})
export class CapsLockDetectDirective implements OnInit{
    @Output() capsLockOn = new EventEmitter<number>();
    capslock:number = 0;
    constructor(){}