Why ion-scroll in v3.9.2 has no bouncing, but v.1 is?

Hello guys,

I’m working Ionic v3.9.2 to make a list thumbnails to able to scrolling and boucing (in first or last thumbnail) with ion-scroll by using scrollX=“true”. I notice that the boucing effect is available in version 1 Ionic, but the current one version is not. Also, there are a lot of events API in version 1. Why latest version is unavailable?

Any help is much appreciated. Thank you!