Practical use of task.defer?

[goldenstein64 (Shoop)]

An example from the Task Library Announcement:

@tnavarts

@wynnrar

I’m still struggling to understand use cases for task.defer .

Here’s a really easy to understand use case:

object.ChildAdded:Connect(function(child)
    if someCondition(child) then
        --> Kaboom! 😢
        child:Destroy()

        --> Destroys on the same frame that the child was added!
        -- (there was no non-hacky way to accomplish this before)
        task.defer(child.Destroy, child) 
    end
end)

I’m expecting to task.spawn to be much more widely used, but I think you’ll find that use cases for task.defer do come up reasonably frequently, mostly in cases where the engine calls your Lua code in the middle of some process, but you need to respond to that process after it completes.