• C#
  • JS

Script language

Select your preferred scripting language. All code snippets will be displayed in this language.


class in UnityEngine


Inherits from: YieldInstruction

Suggest a change


Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.


Sumbission failed

For some reason your suggested change could not be submitted. Please try again in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.



Switch to Manual


Asynchronous operation coroutine.

You can yield until asynchronous operation continues, or manually check whether it's done (isDone) or progress (progress).

See Also: Application.LoadLevelAsync, Application.LoadLevelAdditiveAsync, AssetBundle.LoadAsync.


allowSceneActivationAllow scenes to be activated as soon as it is ready.
isDoneHas the operation finished? (Read Only)
priorityPriority lets you tweak in which order async operation calls will be performed.
progressWhat's the operation's progress. (Read Only)

Inherited members