Detect Ctrl + C and Ctrl + V in an input from browsers : <p>I am using the direct following and I do not detect the copy and paste with the keys inside the input, would someone know how? Thank you!</p>

<pre><code>export class OnlyNumberDirective {
    // Allow decimal numbers. The \, is only allowed once to occur
    private regex: RegExp = new RegExp(/[0-9]+(\,[0-9]{0,1}){0,1}$/g);

    // Allow key codes for special events. Reflect :
    // Backspace, tab, end, home
    private specialKeys: Array&lt;string&gt; = [ 'Backspace', 'Tab', 'End', 'Home', 'Delete', 'Del', 'Ctrl', 'ArrowLeft', 'ArrowRight', 'Left', 'Right' ];

    constructor(private el: ElementRef) {
    }

    @HostListener('keydown', [ '$event' ])
    onKeyDown(event: KeyboardEvent): string {
        // Allow Backspace, tab, end, and home keys
        if (this.specialKeys.indexOf(event.key) !== -1) {
            return null;
        }

        // Do not use event.keycode this is deprecated.
        // See: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode
        let current: string = this.el.nativeElement.value;
        // We need this because the current value on the DOM element
        // is not yet updated with the value from this event
        let next: string = current.concat(event.key);
        if (next &amp;&amp; !String(next).match(this.regex)) {
            event.preventDefault();
            return null;
        } else {
            return next;
        }
    }
}
</code></pre>
