export class OpenCloseComponent {
  onAnimationEvent ( event: AnimationEvent ) {
    // openClose is trigger name in this example
    console.warn(`Animation Trigger: ${event.triggerName}`);
 
    // phaseName is start or done
    console.warn(`Phase: ${event.phaseName}`);
 
    // in our example, totalTime is 1000 or 1 second
    console.warn(`Total time: ${event.totalTime}`);
 
    // in our example, fromState is either open or closed
    console.warn(`From: ${event.fromState}`);
 
    // in our example, toState either open or closed
    console.warn(`To: ${event.toState}`);
 
    // the HTML element itself, the button in this case
    console.warn(`Element: ${event.element}`);
  }
}