.wait(null / $ ,callback)

Description: Wait for ongoing animations to end.

null / $ – undefined or the jQuery token, optional
callback – function(count…), optional
a method that is called once before continuing the jQuery chain.
All current iteration counts/events (from inner-most to outer-most loop) are passed as arguments.

Tip: .wait() is an abbreviation for .join(true). The join() method provides more options when waiting for animations.

Usage pattern