Allow to opt-out of `PositionGhostAbsolutely` for `IOS`

[oemer-aran]

Problem Statement

I am using an overflow-hidden sortable container, which works perfectly fine on all devices, except IOS. I digged a bit into the code and saw, that only for IOS SortableJs is using position: absolute. I don't know why this is the case and there are no comments. I would like to opt-out of this behaviour and use position: fixed instead, so my ghost card wont be clipped.

Here is the code part where PositionGhostAbsolutely is set:

Sortable/src/Sortable.js

Line 145 in ddd0597

PositionGhostAbsolutely = IOS,

Proposed solution:

new Sortable(container, { position: 'fixed' })

// or

new Sortable(container, { iosPosition: 'fixed' })