GSAP Draggable scrollTop snap IOS bug

[Alexis_G]

Hi,

 

I'm building something like this for a mobile view (in a Vue.js webApp), everything work properly on desktop, but the snap doesn't work on Safari / Chrome mobile.
I tried many things (like using type: 'y' instead) but the problem is still the same...

 

Any help would be appreciated,

 

Thanks.

See the Pen OJLNaZw by yyy589 (@yyy589) on CodePen

[GreenSock]

I didn't have a lot of time to look at this, but there are some inherent challenges with scrolling on iOS. If you look at the scrollbar, you'll see that Draggable is indeed being responsive to your touch but iOS is counteracting it in certain cases (no doubt it's trying to be "helpful").  I'd probably avoid the whole scrollTop thing and just affect transforms instead, kinda like this: 

See the Pen mdbPaqv?editors=0010 by GreenSock (@GreenSock) on CodePen

 

Is that any better for you? 

[Alexis_G]

Nope, it's all stuck. Also I'm using this method to avoid page jumps because of the adress bar: https://css-tricks.com/the-trick-to-viewport-units-on-mobile/

I'm using TweenLite and not TweenMax, and added:

 

Wr.addEventListener('touchmove', function(e) {
  e.preventDefault()
}, false)

Maybe it's related?

[GreenSock]

Yeah, I'd guess that is indeed related.