[MC-84610] Off-hand hotkey doesn't work in inventories

The bug

Off-hand hotkey doesn't work in inventories. Expected behavior would be moving the item to off-hand slot or back, just like numbers 1-9 move to represented slots on hotbar or (ctrl+)q drops items.

How to reproduce

Open an inventory (player default, chest, crafting table, furnace, ...)
Hover on an item
Press the off hand key (default F)
→ Notice that nothing happens

Linked issues

is duplicated by 2

MC-116769 Swap item in hands key doesn't function whilst in inventory Resolved

MC-182993 Can't put an item in my offhand in inventory. Resolved

relates to 1

MC-188489 "Switch item with offhand" inventory keyboard shortcut still works in Search Items creative tab, overriding text input Resolved

Comments 4

FaRo1 2016-04-20T12:31:56Z

Confirmed for 16w15b.
What's "postponed"? Should be easy to fix. Just copy the code for the number keys and change the slot number.

user-f2760 2016-04-20T12:33:15Z

Postponed means "We have noticed this bug, and it'll be fixed later.", no need to update postponed tickets.

[Mod] redstonehelper 2017-12-06T21:34:58Z

Depending on how this is fixed this may actually give us the ability to move items into/from the offhand slot in all inventories, even if the slot isn't displayed in the GUI overlay. I'd like that.

Oval 2018-09-17T16:57:18Z

Confirmed for 1.13.1.