How can i make event "onTransitionStart" in Slides component?

There are only ionWillChange, ionDidChange, ionDrag events.

I want ionTransitionStart and ionTransitionEnd which fires when slides animation starts and ends.

It is different from ionWillChange, ionDidChange.

Please Help me.

I tried to add new EventEmitter in ionic-angular/components/slides/slides.js, slides.ts

So, I did make it, but it only works in web view.

It didn’t work in iOS device.

How can I make it? please help me.

on the web console.

on the ios device debugging