I've been attempting to detect when a user presses the Shift+Tab key combination on the keyboard, but for some reason I can't get the event to trigger.
@HostListener('keyup', ['$event'])
@HostListener('keydown', ['$event'])
onkeyup(event) {
if (event.keyCode == 16 && event.keyCode == 9) {
this.isShift = true;
console.log("On Keyup " + event.keyCode);
}
}
onkeydown(event) {
console.log("On KeyDown" + event.keyCode);
}
While Frank Modica's solution is effective, leveraging Angular's key event filtering and pseudo-events offers a more organized and streamlined approach:
@Directive({
selector: '[keyHandler]'
})
export class KeyHandlerDirective {
@HostListener('keydown.shift.tab', ['$event'])
onKeyDown(e) {
// You can use preventDefault() if necessary
// e.preventDefault();
console.log('shift and tab');
}
}
// In the template:
<input type="text" keyHandler />
To explore further examples of how pseudo-events function, check out this resource.
This solution is effective for handling the specified key event:
@Directive({
selector: '[test-directive]'
})
export class TestDirective {
@HostListener('keydown', ['$event']) onKeyDown(e) {
if (e.shiftKey && e.keyCode == 9) {
console.log('shift and tab');
}
}
}
<input type="text" test-directive />
Keep in mind that using the keyup event can be problematic as pressing the Tab key may cause the element to lose focus. As a result, the keyup event might trigger on a different element. Therefore, depending on your requirements, the use of keydown could be more suitable for handling events on the current element.
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