Access Ionic animations data

Ionic Framework
1

Hi, i’m trying to modify ionic side menu animation adding a blur filter to the app when menu’s showed. In order to do so, i’m using a angular directive. I already made the desired effect except the transition duration as it change when the menu opens/closes and the platform is ios or Android.
The directive class is like this:

export class BlurMenuDirective {

  constructor(private el: ElementRef) {
    this.setBackdropFilter('None');
  }

  @HostListener('ionWillOpen') ionWillOpen() {
    this.setBackdropFilter('blur(2px)');
  }

  @HostListener('ionWillClose') ionWillClose() {
    this.setBackdropFilter('None');
  }

  setBackdropFilter(value) {
    this.el.nativeElement.style.backdropFilter = value;
  }
}

I’ve been an hour looking for an answer. Any ideas? It doesn’t matters if i have to hard code the timing to the class or i access programmatically to it.