Undocumented AS3 API

Question

Recently, I happen to know MovieClip.addFrameScript() which is very useful, otherwise timeline script should be coded in fla. Do you know any other undocumented Actionscript3 API?

Answer 1

Here is one:

It allows you to specify a function that is called when the playhead of the Movieclip timeline enters the specified frame number.

Their are four parameters to the method.

MovieClip.addFrameScript(frame:uint, notify:Function, ?:bool, ?:bool)

Passing false as the third parameter and anything as the fourth parameter, clears the function, so that it is no longer called when the playhead enters a previously defined frame number/function combo.