The syntax is different in Ionic2/3. Here's how it should be:
<ion-content (ionScroll)="scrolling($event)" (ionScrollEnd)="scrollComplete($event)"> <ion-list> ... </ion-list> </ion-content>

then in your ts file
constructor(){} scrolling(event) { // your content here for scrolling } scrollComplete(event) { // your content here of scroll is finished } }

The syntax is different in Ionic2/3. Here's how it should be:
<ion-content (ionScroll)="scrolling($event)" (ionScrollEnd)="scrollComplete($event)"> <ion-list> ... </ion-list> </ion-content>
then in your ts file
``` constructor(){} scrolling(event) { // your content here for scrolling }
scrollComplete(event) { // your content here of scroll is finished } }