UndoManager

Resets the current undo state and creates a new UndoManager.

Provides a means for implementing your own undo manager. options has one property, args, an Array, with two elements:

• args[0] is an array of deltas
• args[1] is the document to associate with

Arguments

Returns true if there are redo operations left to perform.

Returns true if there are undo operations left to perform.

Perform a redo operation on the document, reimplementing the last change.

Arguments

Destroys the stack of undo and redo redo operations.

Perform an undo operation on the document, reverting the last change.

Arguments